Puzzle Detail
Math Worksheets Math Brain Teasers — Set 9
| 6= | 5- | 1=1 | 8= | 140x | ||||
| 64x | 9= | 2= | 6= | 5= | 7=7 | 4 | ||
| 8= | 6= | 17+ | 11+ | 162x | ||||
| 22+ | 8= | 9= | 3= | |||||
| 16+6 | 3= | 5= | 5+ | |||||
| 21+ | 8= | 4= | 9= | |||||
| 12+ | 4= | 8/ | 384x | 6= | ||||
| 13+ | 9= | 3 | 126x | 24+ | 1= | |||
| 3 | 20+ |
Show solution
| 2 | 6 | 4 | 3 | 7 | 9 | 1 | 8 | 5 |
| 8 | 1 | 9 | 2 | 6 | 5 | 7 | 3 | 4 |
| 4 | 8 | 6 | 5 | 2 | 1 | 3 | 9 | 7 |
| 7 | 4 | 2 | 1 | 5 | 8 | 9 | 6 | 3 |
| 6 | 9 | 8 | 7 | 4 | 3 | 5 | 1 | 2 |
| 3 | 7 | 5 | 8 | 1 | 4 | 6 | 2 | 9 |
| 9 | 3 | 1 | 4 | 8 | 7 | 2 | 5 | 6 |
| 5 | 2 | 7 | 9 | 3 | 6 | 8 | 4 | 1 |
| 1 | 5 | 3 | 6 | 9 | 2 | 4 | 7 | 8 |
Solver Notes
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Our math brain teasers use the mathdoku puzzle format to challenge arithmetic reasoning and logical deduction simultaneously.
Are mathdoku puzzles good brain teasers?
Yes — mathdoku requires you to combine arithmetic calculation with logical elimination, engaging both analytical and numerical thinking.
Who are math brain teasers suitable for?
They suit ages 8 and up — students, adults, and anyone who enjoys keeping their mental math sharp.
Are solutions included?
Yes — every brain teaser puzzle comes with a complete solution.