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 -1. #mathsky #iTeachMath

Start your day with this #yohaku. Fill in cells with 9 different factors of 972 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 140 to get totals shown in each row/column. #mathsky #iTeachMath

Nice to see the trilliums still in bloom on my run... I'll enjoy them whilst I can!

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

Another close encounter with a beaver on this afternoon's run. I loved the way it silently dove under the water as it neared me.

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 -2. #mathsky #iTeachMath

Start your day with this #yohaku. Fill in cells with 9 different factors of 896 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 192 to get totals shown in each row/column. #mathsky #iTeachMath

My reward for today's run with a very close encounter with this beautiful grey blue heron. "I come into the peace of wild things..." (Wendell Berry)

Here's a #yohaku to take you into the weekend. Fill in cells with 16 different factors of 420 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 -9. #mathsky #iTeachMath

Saw these trilliums in bloom on my run today. I will enjoy them whilst I can!

Start your day with this #yohaku. Fill in cells with 9 different factors of 320 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 210 to get totals shown in each row/column. #mathsky #iTeachMath

Was so happy to see this beautiful beaver on my run today... the first I have seen this year!

Apologies: here is the correct template for yesterday’s puzzle.

Here's a #yohaku to take you into the weekend. Fill in cells with 16 different factors of 720 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 510 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 440 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 468 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 -10. #mathsky #iTeachMath

Start your day with this #yohaku. Fill in cells with 9 different factors of 728 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 234 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 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 0. #mathsky #iTeachMath

Start your day with this #yohaku. Fill in cells with 9 different factors of 168 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

Loved seeing the Nutella jar floating by on Artemis 2 just now!

Start your week with this #yohaku. Fill in cells with 9 different factors of 84 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 630 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 -5. #mathsky #iTeachMath

Start your day with this #yohaku. Fill in cells with 9 different factors of 510 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 280 to get totals shown in each row/column. #mathsky #iTeachMath

I saw Project Hail Mary last week and loved it so much that I had to re-read the book. I had remembered about the Eridian base-6 number system but hadn't noticed how the last chapter was numbered. I might give this to my students on Monday as an opening task!

Here's a #yohaku to take you into the weekend. Fill in cells with 16 different factors of 630 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 -2. #mathsky #iTeachMath

Start your day with this #yohaku. Fill in cells with 9 different factors of 550 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 90 to get totals shown in each row/column. #mathsky #iTeachMath

Saw my first heron of the year on my daily run. It was actually sleeping when I first spotted it and only stirred when I got closer.

Here's a #yohaku to take you into the weekend. Fill in cells with 16 different factors of 240 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 -3. #mathsky #iTeachMath