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Квантландия | Интересные задачи и не только

@kvantland

On this record: Growth · Engagement · Reactions · Posts · Polls · Citations · Cite this entry

5,819subscribers

+8 since we began measuring on 6 August 2026

Risers and fallers across the register · movement among entries of 3,162–10,000.

Register entry

Telegram ID-1002077518551
TypeChannel
Username@kvantland
CreatedBetween 1 November 2023 and 31 May 2024— estimated from Telegram’s id allocation, not measured. How this range is calculated.
First recorded6 August 2026
Last confirmed live13 August 2026
Measurements held4
Confirmed unchanged1 time, most recently 13 August 2026
On Telegramt.me/kvantland

Growth

5,8105,8195,814.56 August 2026 — 5,811 subscribers6 August 2026 — 5,810 subscribers9 August 2026 — 5,813 subscribers13 August 2026 — 5,819 subscribers6 August 202613 August 2026
4 measurements spanning 7 days, net +8. Dots are measurements; the straight line between them is drawn to join them, not to claim we know the path taken in between — snapshots are recorded only when a count changes, so gaps mean “no change observed”, never “interpolated”. The vertical axis spans 5,809–5,820 and does not start at zero.
Measurement log — every subscribers count we have recorded
Measured (UTC)SubscribersChange
13 Aug 2026, 00:145,819+6
9 Aug 2026, 22:315,813+3
6 Aug 2026, 18:425,810-1
6 Aug 2026, 11:035,811first reading

Engagement

29 posts held, back to 25 July 2026the reader has not yet reached the start of this channel’s public history, so older posts may sit further back, unread. Read across 9 pagesof Telegram’s post history, 20 posts per page.

ERR · 30 days
15.7%
avg views ÷ 5,819 subscribers
Avg views / post
914
28 posts measured
Reaction rate
1.31%
reactions ÷ views · ER floor
Posts in window
29
of 29 held

ERR is average views per post over the last 30 days divided by subscribers, the definition TGStat uses, so this figure is comparable with the one you will see elsewhere. It falls structurally as a channel grows: a high ERR on a small channel and a low one on a large channel describe reach mathematics, not quality. We publish the figure and the sample it came from and pass no verdict on it.

ER is defined industry-wide as (forwards + reactions + comments) ÷ views— note the denominator is views, not subscribers. Telegram’s public web preview carries views and reactions but not forward or comment counts, so the reaction rate above is the reactions term only and is therefore a floor: the true ER for this channel is higher by an amount we have not measured and will not estimate. It is computed over the 25 of 28 measured posts that carry a reaction reading, and over those same posts' views.

What these figures were computed from
WindowRolling 30 days · latest post in window 11 August 2026
Posts held29 (25 July 202611 August 2026)
Views total25,582
Reactions total299
Forwards / commentsnot exposed by the public surface — not measured, not estimated
Readings taken12 Aug 2026, 03:50 UTC

Views are a single reading per post, taken at the time above. A post published in the last day or two is still accumulating views, which pulls the 30-day average down slightly. That is a property of the standard definition rather than a fault in it, so we keep the definition rather than “correcting” the number into something nobody can reproduce.

Precision. Telegram publishes view counts on its public widget in short form — 8.12K, 3.7M — so any reading at or above 1,000 reaches us rounded to three significant figures, and only counts below 1,000 are exact. Averages and rates derived from them are shown to the same precision rather than to the unit: a figure like 3,701,250 would assert digits nobody measured.

Reaction counts are published per emoji and rounded the same way, so a total below 1,000 is exact and a larger one is a sum that may carry a rounded component from each emoji above 1,000. Because it is a sum, it does not look rounded — read a large reaction total as three significant figures per contributing emoji rather than as the figure it prints.

Reaction mix

299 reactions across 25 posts, in 11 distinct kinds. The most used accounts for 40.8% of them.

Every reaction kind recorded on the sample, most used first
ReactionCountShareShare, drawn
12240.8%
👍6020.1%
🔥5317.7%
😁3913.0%
🎉103.34%
😱41.34%
31.00%
👏31.00%
🕊31.00%
🐳10.334%
🤔10.334%

No sentiment is inferred, and none should be read in. This table is ordered by count and by nothing else. Emoji do not carry stable meaning across languages or communities — 🙏 is thanks in one channel and mourning in another — so we publish which ones were pressed and how often, and pass no judgement on what an audience meant by them.

Precision. Telegram publishes reaction counts per emoji and short-forms each one — 4.34K, 1.2M — so any single kind at or above 1,000 reaches us at three significant figures, and only counts below 1,000 are exact. The shares above are ratios of those figures and carry the same error. This is also why the total here can differ slightly from a reaction total printed elsewhere on the page: both are sums of the same rounded parts, taken over samples with different edges.

Coverage. Reactions were read on 25 of the 29 sampled posts in this sample. Summed by Telegram’s own count on each post — not by adding up the per-emoji breakdown above — those same posts carry 299reactions in total: the kind of figure the paragraph above means by “a reaction total printed elsewhere on the page”.

Measured over the 29 most recent posts we hold, published 25 July 2026 to 11 August 2026, using the newest reading held for each. Telegram Stars are excluded: they are a payment, not a reaction, and they have their own section.

Recent posts

11 Aug 2026, 06:36 UTC490 views12 reactionsread 12 August 2026
Photo

“Как уральские дети Эйлера перехитрили” Возможно первая олимпиадная задача, которую я встретил в своей жизни, была следующей. Дело было в детском саду в СССР. Посмотрите на первую картинку (открытый конверт). Нарисуйте её карандашом, не проводя по одной линии дважды и не отрывая карандаша от листа бумаги. Справились? А теперь попробуйте сделать то же самое для “запечатанного конверта” (второй рисунок). Великий матем

😁74🔥1

10 Aug 2026, 12:48 UTC573 views11 reactionsread 12 August 2026
Photo

Друзья! Напоминаем, что сегодня последний день, когда действует скидка 10% по промокоду Kvantland на летнюю математическую школу Квантландия 24-28 августа для поступивших в 5-7 классы. Осталось 4 места! Как это будет и почему стоит участвовать: 1. В первый день диагностика уровня участника и распределение в одну из мини-групп своего уровня. 2. Специально для Вас мы собрали уникальную команду преподавателей, авторов

👍54🔥2

10 Aug 2026, 05:29 UTC574 viewsread 12 August 2026
Poll

Какое число может быть на карточке у Глеба?

  1. 28%
  2. 339%
  3. 415%
  4. 3 или 435%
  5. Правильный ответ другой4%

Shares as published, totalling 101%. No per-option vote count is published by Telegram, so none is shown.

10 Aug 2026, 05:22 UTC589 views11 reactionsread 12 August 2026
Photo

Сегодня в качестве утренней разминки симпатичная задачка про карточки (автор А. Грибалко) с новой картинкой от нашего художника ❤️. Антон, Боря, Витя, Глеб и Дима сидят за круглым столом именно в таком порядке по часовой стрелке. Им раздали по карточке, на которых написаны числа 1, 2, 3, 4, 5, каждый видит только своё число. Саша задал всем вопрос: «Твоё число больше, чем у твоих соседей?», и мальчики ответили в ука

9👍1🔥1

9 Aug 2026, 14:46 UTC678 views10 reactionsread 12 August 2026
Photo

“Дабромат” проводит серию бесплатных онлайн-лекций по геометрии для всех желающих. В основном это лекции для старших школьников, но большинство задач моего занятия “Необычные построения” доступны и ученикам 7-8 класса! Разберём интересные задачи, некоторые из которых были на нашем канале, а также некоторые новые задачки. Приходите, будет интересно! Подробности и запись на лекции здесь: https://clck.ru/3V7yxP 10.08

👍53🔥2

8 Aug 2026, 05:28 UTC749 views17 reactionsread 12 August 2026
Photo

“Три задачи на засыпку” Иногда нас упрекают, что на канале мало простых задач. Внимание! Мы исправляемся и сегодня аж три такие задачи. Но в каждой есть маленькая хитрость😁 Итак, у Вас три минуты на три задачи. Ответы можно писать в комментариях, но не забывайте их скрывать. А если Вам нравится новая рубрика, то обязательно поставьте ❤️ 1. Сколько граней у нового шестигранного карандаша? 2. На стоянке такси стояло 7

12😁4🔥1

7 Aug 2026, 16:45 UTC≈1,120 views9 reactionsread 12 August 2026
Photo

Друзья! 1. Напоминаем Вам, что сейчас идут турниры с интерактивными задачами по математике https://math.kvantland.com/ и по физике https://phys.kvantland.com/ Участие бесплатное, победители получат призы! Проходить нужно на ноутбуке (не мобильных устройствах) и регистрироваться на турнир лучше не с gmail-почтой, а с альтернативной. Решать можно в любое удобное время. По математике мы продлили турнир до 31 августа, по

4🔥3👍2

7 Aug 2026, 05:55 UTC828 views27 reactionsread 12 August 2026
Photo

Однажды в журнале “Квантик” была опубликована задача по геометрии ученика 4 класса! Вот эта задача: На каждой из сторон треугольника ABC выбраны красная и синяя точки так, что красная точка делит сторону в отношении 2 : 1, а синяя – в отношении 1 : 2 (если обходить треугольник по часовой стрелке). Через красные точки провели окружность, и через синие – тоже. Докажите, что отрезок, соединяющий центры этих окружностей

🔥158😱4

6 Aug 2026, 15:34 UTC≈1,440 views19 reactionsread 12 August 2026
Photo

Сегодня День Рождения у автора замечательных задач Константина Кнопа. Поздравляем! И по этому поводу в качестве вечерней разминки отличный математический фокус (автор К. Кноп): Фокусник с помощником показывают фокус. В ряд стоят 12 закрытых пустых шкатулок. Фокусник уходит, а зритель на виду у помощника прячет по монетке в любые две шкатулки по своему выбору. Затем возвращается фокусник. Помощник открывает одну шкат

🎉105👍4

6 Aug 2026, 07:07 UTC779 views9 reactionsread 12 August 2026
Photo

“Пусть будет так.” Cегодня в качестве разминки моя новая числовая задачка, которая совсем недавно была на турнире Савина. Члены жюри считали задачу несложной, но многие участники с ней не справились. DeepSeek в режиме “умного поиска” также не справился. Долго что-то писал, а потом выдал: “Пусть будет так” (см. скрин).😁 В режиме “глубокого мышления” получил верный ответ, но решение заняло страниц 10. Тем не менее ест

😁43👍2

5 Aug 2026, 05:16 UTC860 views6 reactionsread 12 August 2026
Photo

Раньше мнимые “вечные двигатели” выставляли в витринах часовых магазинов для привлечения внимания. Забавную историю рассказывает Яков Перельман в своей книге: “Один рекламный вечный двигатель доставил мне однажды немало хлопот. Мои ученики-рабочие были им настолько поражены, что оставались холодны к моим доказательствам невозможности существования вечного двигателя. Вид шариков, которые, перекатываясь, вращали колес

4👍1🔥1

5 Aug 2026, 05:15 UTC804 views15 reactionsread 12 August 2026
Photo

“При чём здесь вечный двигатель?” Ещё в школе мне встретилась любопытная задача: Докажите, что по крайней мере одно из оснований перпендикуляров, опущенных из внутренней точки M выпуклого многоугольника на его стороны, лежит на самой стороне, а не на её продолжении. Физики предложили такое решение. Предположим, что все основания перпендикуляров падают на продолжение стороны, а не на саму сторону. Построим “колесо”

9👍4😁2

Showing the 12 most recent of 29 posts we hold for @kvantland. View and reaction counts are the latest single reading for each post, not a live figure, and a recent post is still accumulating both. A view count marked was rounded by Telegram before we ever saw it — t.me prints views in full below 1,000 and to three significant figures above, so ≈1,200,000 means somewhere between 1,150,000 and 1,249,999. Unmarked counts are exact. Text is reproduced from the public post preview and truncated for length.

Polls

The 3 polls we hold for this entry, as Telegram rendered them when we read the post. A poll’s figures keep moving after that, so each one is dated.

10 Aug 2026, 05:29 UTCAnonymous Quiz75 voters

Какое число может быть на карточке у Глеба?

  1. 28%
  2. 339%
  3. 415%
  4. 3 или 435%
  5. Правильный ответ другой4%

Shares as published, totalling 101%. No per-option vote count is published by Telegram, so none is shown.

3 Aug 2026, 06:35 UTCAnonymous Quiz69 voters

Какой номер имела бы эта страница, если складывать «гармошкой» сначала вдоль вертикали в прямоугольник 1×5, а потом вдоль горизонтали?

  1. 4612%
  2. 5025%
  3. 5629%
  4. 6632%
  5. Правильный ответ другой3%

Shares as published, totalling 101%. No per-option vote count is published by Telegram, so none is shown.

27 Jul 2026, 05:55 UTCAnonymous Quiz83 voters

Какое наименьшее число жителей могут быть довольны большинством принятых решений?

  1. 918%
  2. 1019%
  3. 1139%
  4. 128%
  5. Правильный ответ другой16%

Shares as published. No per-option vote count is published by Telegram, so none is shown.

Percentages only — there are no per-option vote counts here, because Telegram publishes none.The public post preview gives each option’s share and a single voter total, and nothing else. Multiplying one by the other would produce a per-option tally that looks measured and is not: the shares are rounded to whole numbers before we ever see them. We print what was published and leave the column that does not exist empty.

The shares need not add up to 100.Rounding alone puts many polls at 99 or 101. A poll that allows more than one answer per voter runs well past 100 by design, and several here do. The bars are drawn against a fixed 100% track at each option’s own percentage rather than normalised to the total, so a poll that exceeds it shows that it does instead of being quietly rescaled.

Read from the 29 most recent posts we hold, published 25 July 2026 to 11 August 2026. Telegram labels each poll by kind — an anonymous poll, a quiz, a closed set of final results — and that label is reproduced rather than paraphrased.

Citation-graph rank

Citation-graph rank — 100,822 of 1,160,990entries in the measured graph. A weighted position computed from the forward and mention edges below — republished posts weigh more than named mentions — and recomputed periodically, over the whole graph. Published only as this ordinal position, never as a score: a position is a fact, and a score printed beside one channel’s name would read as a verdict this register does not make. The two counts beneath stay separate for the same reason mentions are never summed with forwards anywhere else on this page — a named-by count costs nothing to manufacture. The top 100 by this measure, or how it is computed.

Forward network

Republished by

Channels on the register that have forwarded this channel's posts into their own feed.

Built only from forwarded posts we have actually read, on both sides. Coverage is early and deliberately incomplete: a missing link means we have not read the post that would prove it, never that the relationship does not exist. Counts are distinct forwarded posts observed, so they only ever go up as we read more.

Mentions

Named by 4 registered channels — every channel on the register whose own posts have named this one, by its current username or any other username it currently holds, merged from two separately captured readings of the same fact so a namer caught by only one of them is not missed and a namer both caught is not counted twice. A username this channel has since dropped is not matched — that handle may belong to someone else now, and crediting today’s namer to yesterday’s owner would misattribute it.

A mention is a weaker signal than a forward and is counted separately for that reason — naming a channel is not republishing it, and a handle in a post body is easy to place deliberately. The post counts beside each row below are distinct posts in which the handle appeared, from posts we have read on both sides — the “Named by N registered channels” figure above is a different count, of distinct NAMING CHANNELS rather than posts, and is not the sum of the rows under it.

Cite this entry

A live page changes as we take new readings, so a citation should name the measurement it is based on, not just the URL. The line below cites the subscriber count as measured 13 August 2026 — this entry's latest reading, not the date you are reading this.

“Квантландия | Интересные задачи и не только” (@kvantland), 5,819 subscribers as measured 13 August 2026. Telegram Register, tgregister.com/channel/kvantland.

Full measurement history, CC BY 4.0. Every reading this register holds for this entry, not just the latest one, as a dated, downloadable record: CSV · JSON. Free to use with attribution to tgregister.com. Each file carries its own generation timestamp, which is the figure to cite for exactly when the data was retrieved.