Math Kangaroo

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[Math Kangaroo @CMKContest]

Last chance to register for the Canadian Math Kangaroo contest on March 19, 2023! Deadline is February 26 at https://t.co/PSGgsBHuBY. Questions? Email [email protected]

[Math Kangaroo @CMKContest]

The contest is available in both English and French, in-person and online, for student in Canada. Special conditions apply for the online participation.
Training classes are available.
Register at https://t.co/e00ePadLVL.

[Math Kangaroo @CMKContest]

Happy New Year 2023!

[Math Kangaroo @CMKContest]

You can find the rest of the 25 puzzles in the thread below:
https://t.co/TjCcwTvA7b

[Math Kangaroo @CMKContest]

Here is a compilation of the second part of our Math Advent Calendar 2022. You can find all tweets under the #mathadvent hashtag

Day 15, factoring and number theory:
https://t.co/xnwpHQjPhk

[Math Kangaroo @CMKContest]

A thread of the first 2 weeks in the 2022 #mathadvent from @CMKContest
(a 12-tweet🚂polar express🚂of math challenges)

Days 1 and 2:
https://t.co/ANCQmwB1zu

[Math Kangaroo @CMKContest]

Let us start a #mathadvent! Day 1
🍃🌲
Tell me, on this first of December:
What is this digit that I remember?
When added to 6 or divided by 3
It changes, but it doesn't cease to be
A positive digit.
☃️🏂

[Math Kangaroo @CMKContest]

Day 14, feeling adventurous with a small animation: can you picture the solid gemstone?

https://t.co/U7Jyu1rhbF

[Math Kangaroo @CMKContest]

On day 14 of the #mathadvent, more geometry!

Six-sided figure in my hand
It's one face of a solid gem
Lights out, I'm trying to understand
Gem's facets, ₐₜ least how many of them?

[Diego Rattaggi 🇨🇭 @diegorattaggi]

Geometry puzzle. #mathiratti

[AnecdotesMaths @AnecdotesMaths]

Si vous effectuez le produit de quatre nombres entiers consécutifs et que vous ajoutez 1, vous obtenez un carré parfait.
Exemple: 4 × 5 × 6 × 7 + 1 = 841 = 29²

[AnecdotesMaths @AnecdotesMaths]

Le nombre premier 1111114111144441142411444411114111111 (qui forme un palindrome) peut être disposé en étoile à 6 branches. Si vous concaténez le nombre de chiffres par ligne (1, 2, 7, 6, 5, 6, 7, 2, 1), vous obtenez aussi un nombre premier (qui est aussi un palindrome).

[Math Kangaroo @CMKContest]

Day 25, 3D geometry and factoring, was a retelling of a beautiful problem from the 2003 Math Kangaroo contest, grade 7-8.
(It was another tough one, but you can try factors and find the answer with ease, or draw a picture!)

https://t.co/mdWBhcThjJ

[Math Kangaroo @CMKContest]

Day 25 (final day) of #mathadvent:

42 sugar cubes packed in one box,
Its bottom's length + width is 9 sugar-cube-sides.
Measured in sugar cubes, please work out the box's
sugar-cube height?

Merry Christmas to all who mark it! Find more math puzzles at https://t.co/z7iLOstzwR

[Math Kangaroo @CMKContest]

Here is a compilation of the second part of our Math Advent Calendar 2022. You can find all tweets under the #mathadvent hashtag

Day 15, factoring and number theory:
https://t.co/xnwpHQjPhk

[Math Kangaroo @CMKContest]

Day 15 of #mathadvent brings a tanka:

The largest digit.
Check if your number can be
divided by 𝖎𝖙:
add up the digits, again
ask if 𝖎𝖙's the sum's factor.

[Math Kangaroo @CMKContest]

Day 24, algebra and numbers:
https://t.co/fYWTbYxM0Z

[Math Kangaroo @CMKContest]

Day 24 of #mathadvent

Just 2 more, just 2 more!
What's 20% of a score?

A score is the English word for twenty:
20% of it's this many.

[Math Kangaroo @CMKContest]

(For example, today's puzzle is a retelling of a 2003 grade 7-8 contest question: can you spot the original version? https://t.co/jom61ABJ09)

[Math Kangaroo @CMKContest]

Day 25 (final day) of #mathadvent:

42 sugar cubes packed in one box,
Its bottom's length + width is 9 sugar-cube-sides.
Measured in sugar cubes, please work out the box's
sugar-cube height?

Merry Christmas to all who mark it! Find more math puzzles at https://t.co/z7iLOstzwR

[Math Kangaroo @CMKContest]

🎄🔔Hark how the bells 🔔🎄
Sweet silver bells
All seem to say
Throw cares away

Happy #ChristmasEve to all who celebrate!

[Catriona Agg @Cshearer41]

There’s loads of connections between maths and bellringing 🤓

Instead of tunes, ringers memorise sequences of changes - permutations where each bell can only swap with the one immediately before or after. In the video above, 11 bells move with the 12th always ringing last.