# Arithmetic Puzzle

The British Independent and i newspapers run what they call an "Arithmetic Puzzle", which comprises a grid of nine cells, with each cell separated from the others by arithmetic symbols: (+ - / *), and a "result" row/column to the right and below. One or two cells have a single digit pre-inserted, and the task is to insert the other digits so that the equations are valid. Something like this (operations are performed left-to-right and top-to-bottom, not in standard mathematical order):

|  1  | x |  3  | x |  4  | =  12 |
|  +  |   |  +  |   |  -  |
|  8  | x |  5  | x |  6  | = 240 |
|  +  |   |  +  |   |  X  |
|  2  | + |  9  | + |  7  | =  18 |
|  =  |   |  =  |   |  =  |
| 11  |   | 17  |   |-14  |


Is there a specific name for this sort of puzzle?

• Welcome to Puzzling!
– Deusovi
Sep 19, 2016 at 21:27
• I think they are called "Cross-Math Puzzles" (not "Math-Cross"!), but right now I can't find any evidence that this is the official name, since you can find the same type of puzzles just by searching "arithmetic grid".
– user14478
Sep 19, 2016 at 21:39
• Closely related but not an exact match: Number Blocks
– humn
Sep 19, 2016 at 22:06
• 1 + 3 + 4 = 12 should be 1 x 3 x 4 = 12 (or 1 + 3 + 4 = 8), surely? Sep 20, 2016 at 12:37
• @paolo, Well spotted. It should have been 1x3x4. Fixed Sep 20, 2016 at 12:42