Mike Jacobs

Start your day with this #yohaku. Fill in cells with 9 different factors of 690 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

Spotted this beautiful egret on my run today.

Start your week with this #yohaku. Fill in cells with 9 different factors of 460 to get totals shown in each row/column. #mathsky #iTeachMath

Spotted this clouded sulphur butterfly on my run today. Nice to see these this late in the fall.

Happy Pythagorean triple day! It is 24/10/26 (or, if you will, 10/24/26) and these numbers form a right-angled triangle. Enjoy it while you can though as there will not be another one this century.

Here's a #yohaku to take you into the weekend. Fill in cells with 16 different factors of 576 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 -2. #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

Start your day with this #yohaku. Fill in cells with 9 different factors of 870 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 96 to get totals shown in each row/column. #mathsky #iTeachMath

Once these elderflowers ripened to elderberries, I harvested them and yesterday combined with fresh ginger, cinnamon sticks and honey to make some elderberry syrup. Always popular with the family!

Here's a #yohaku to take you into the weekend. Fill in cells with 16 different factors of 990 to get totals shown in each row/column AND shaded cells contain prime 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 448 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 444 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 prime 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

Start your day with this #yohaku. Fill in cells with 9 different factors of 930 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 580 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 660 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 -8. #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 460 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 960 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 520 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 240 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 840 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

Start your day with this #yohaku. Fill in cells with 9 different factors of 750 to get totals shown in each row/column. #mathsky #iTeachMath

Today saw the start of year 37 for me in teaching!

"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 567 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 990 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 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 570 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 624 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 210 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

Nice views of this great blue heron on my run today.

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