Puzzle Detail
Math Worksheets Math Brain Teasers — Set 7
| 4= | 9= | 2= | 33+ | 7=7 | ||||
| 18x | 18+ | |||||||
| 14+ | 14+ | 13+8 | 2= | 2- | ||||
| 1- | 9-7 | 4 | 1= | 6= | 18x3 | |||
| 7= | 4= | 5+ | 1- | 3= | ||||
| 7= | 1- | |||||||
| 21+ | 9= | 4/ | 4- | 4= | ||||
| 15+ | 8= | 6= | 4/ | 1 | ||||
| 1944x | 3- |
Show solution
| 4 | 9 | 2 | 1 | 6 | 3 | 5 | 8 | 7 |
| 1 | 6 | 4 | 5 | 3 | 2 | 8 | 7 | 9 |
| 5 | 3 | 1 | 8 | 2 | 4 | 7 | 9 | 6 |
| 8 | 2 | 5 | 7 | 4 | 1 | 9 | 6 | 3 |
| 7 | 4 | 8 | 9 | 1 | 5 | 6 | 3 | 2 |
| 9 | 1 | 7 | 6 | 5 | 8 | 3 | 2 | 4 |
| 6 | 5 | 9 | 3 | 8 | 7 | 2 | 4 | 1 |
| 3 | 8 | 6 | 2 | 7 | 9 | 4 | 1 | 5 |
| 2 | 7 | 3 | 4 | 9 | 6 | 1 | 5 | 8 |
Solver Notes
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.