Start your day with this #yohaku. Fill in cells with 9 different factors of 216 to get totals shown in each row/column. #mathsky #iTeachMath

Start your day with this #yohaku. Fill in cells with 9 different whole numbers to get products shown in each row/column. More free puzzles and books/ebooks for all ages can be found at yohaku.ca

Start your week with this #yohaku. Fill in cells with 9 different factors of 216 to get totals shown in each row/column. #mathsky #iTeachMath

Looking for Christmas stocking stuffers? Why not try one of my yohaku puzzle books?

A student told me that their calculator was giving the wrong answer. 'Look! I know that 32 divided by 2 is 16. Why does it say 19?' Can you see what is happening?

Here's a #yohaku to take you into the weekend. Fill in cells with 16 different factors of 828 to get totals shown in each row/column AND shaded cells contain square numbers. #mathsky #iTeachMath

Try this shady #yohaku. Fill in cells with 9 different integers to get products shown in each row/column AND sum of 4 shaded cells is -7. #mathsky #iTeachMath

As I finished my daily run in the dark today I could smile to myself. Here in Oshawa, today is the day where the sun begins to set a little bit later each day (even though the day length is still getting shorter). It's only an extra second but it feels great!!

Start your day with this #yohaku. Fill in cells with 9 different factors of 198 to get totals shown in each row/column. #mathsky #iTeachMath

Start your day with this #yohaku. Fill in cells with 9 different whole numbers to get products shown in each row/column. More free puzzles and books/ebooks for all ages can be found at yohaku.ca #mathsky #iTeachMath

Start your week with this #yohaku. Fill in cells with 9 different factors of 306 to get totals shown in each row/column. #mathsky #iTeachMath

[New Post] Ontario Math Links - My favourite #math related links from this week: ontariomath.blogspot.com/2025/12/math... Links and help from @amplifyeducation.bsky.social @themathguru.bsky.social @mikejacobs.bsky.social @howiehua.bsky.social @ganeshuor.bsky.social and more

Here's a #yohaku to take you into the weekend. Fill in cells with 16 different factors of 336 to get totals shown in each row/column AND shaded cells contain triangle numbers. #mathsky #iTeachMath

Try this shady #yohaku. Fill in cells with 9 different integers to get products shown in each row/column AND sum of 4 shaded cells is -13. #mathsky #iTeachMath

Start your day with this #yohaku. Fill in cells with 9 different factors of 456 to get totals shown in each row/column. #mathsky #iTeachMath

Start your day with this #yohaku. Fill in cells with 9 different whole numbers to get products shown in each row/column. More free puzzles and books/ebooks for all ages can be found at yohaku.ca

Start your week with this #yohaku. Fill in cells with 9 different factors of 315 to get totals shown in each row/column. #mathsky #iTeachMath

Had an interview yesterday: hopefully I will be selected as a volunteer at the @fifaclubworldcup.bsky.social in Toronto next year!

Latha Naomh Anndra sona dhuibh! Happy St. Andrew's Day🏴󠁧󠁢󠁳󠁣󠁴󠁿

Here's a #yohaku to take you into the weekend. Fill in cells with 16 different factors of 882 to get totals shown in each row/column AND shaded cells contain square numbers. #mathsky #iTeachMath

Try this shady #yohaku. Fill in cells with 9 different integers to get products shown in each row/column AND sum of 4 shaded cells is -5. #mathsky #iTeachMath

I gave this #OpenMiddle task to my students: use the digits 0 to 9 at most once only to make each statement true. It really got them thinking carefully about the exponent laws we learnt about.

Start your day with this #yohaku. Fill in cells with 9 different factors of 342 to get totals shown in each row/column. #mathsky #iTeachMath

"Start your day with this #yohaku. Fill in cells with 9 different whole numbers to get products shown in each row/column. More free puzzles and books/ebooks for all ages can be found at yohaku.ca

Saw these unusual floor tiles at the weekend. What is the ratio of the area of the beige hexagon to the area of the brown octagon?

Start your week with this #yohaku. Fill in cells with 9 different factors of 224 to get totals shown in each row/column. #mathsky #iTeachMath

Here's a #yohaku to take you into the weekend. Fill in cells with 16 different factors of 980 to get totals shown in each row/column AND shaded cells contain square numbers. #mathsky #iTeachMath

I gave this warm up problem to my classes today. It was a big hit!

Try this shady #yohaku. Fill in cells with 9 different integers to get products shown in each row/column AND sum of 4 shaded cells is -9. #mathsky #iTeachMath

Start your day with this #yohaku. Fill in cells with 9 different factors of 364 to get totals shown in each row/column. #mathsky #iTeachMath

I'm very happy to be supporting Maths Week England @maths_week Check out their website for an amazing set of resources for this week, including some yohaku puzzles for all ages! #MWE

Start your day with this #yohaku. Fill in cells with 9 different whole numbers to get products shown in each row/column. More free puzzles and books/ebooks for all ages can be found at yohaku.ca

Start your week with this #yohaku. Fill in cells with 9 different factors of 450 to get totals shown in each row/column. #mathsky #iTeachMath

Here's a #yohaku to take you into the weekend. Fill in cells with 16 different factors of 540 to get totals shown in each row/column AND shaded cells contain triangle numbers. #mathsky #iTeachMath

Try this shady #yohaku. Fill in cells with 9 different integers to get products shown in each row/column AND sum of 4 shaded cells is -4. #mathsky #iTeachMath

Start your day with this #yohaku. Fill in cells with 9 different factors of 350 to get totals shown in each row/column. #mathsky #iTeachMath

Start your day with this #yohaku. Fill in cells with 9 different whole numbers to get products shown in each row/column. More free puzzles and books/ebooks for all ages can be found at yohaku.ca

I came across a really nice way of visually showing the sum of the first n square numbers. Details in this blog: themathguy.blogspot.com/2025/11/the-...

Start your week with this #yohaku. Fill in cells with 9 different factors of 120 to get totals shown in each row/column. #mathsky #iTeachMath

Here's a #yohaku to take you into the weekend. Fill in cells with 16 different factors of 432 to get totals shown in each row/column AND shaded cells contain square numbers. #mathsky #iTeachMath

Try this shady #yohaku. Fill in cells with 9 different integers to get products shown in each row/column AND sum of 4 shaded cells is -5. #mathsky #iTeachMath

Start your day with this #yohaku. Fill in cells with 9 different factors of 910 to get totals shown in each row/column. #mathsky #iTeachMath

"Start your day with this #yohaku. Fill in cells with 9 different whole numbers to get products shown in each row/column. More free puzzles and books/ebooks for all ages can be found at yohaku.ca

Start your week with this #yohaku. Fill in cells with 9 different factors of 294 to get totals shown in each row/column. #mathsky #iTeachMath

Don't forget to turn ALL your clocks back today!

Here's a #yohaku to take you into the weekend. Fill in cells with 16 different factors of 882 to get totals shown in each row/column AND shaded cells contain square numbers. #mathsky #iTeachMath

Try this shady #yohaku. Fill in cells with 9 different integers to get products shown in each row/column AND sum of 4 shaded cells is -4. #mathsky #iTeachMath

Start your day with this #yohaku. Fill in cells with 9 different factors of 350 to get totals shown in each row/column. #mathsky #iTeachMath

Start your day with this #yohaku. Fill in cells with 9 different whole numbers to get products shown in each row/column. More free puzzles and books/ebooks for all ages can be found at yohaku.ca #mathsky #iTeachMath

Start your week with this #yohaku. Fill in cells with 9 different factors of 140 to get totals shown in each row/column. #mathsky #iTeachMath