jamesnulty

09-03-2015, 10:30 AM

Since there are so many mathematicians on here, can you confirm for me my thoughts about my 8 year old daughter's homework? I think she was set an impossible problem.

First the easy bit: simple addition practice. Imagine a square split into four smaller squares. She had to put 4 different numbers (1-9 only) in each square, then add up the four double digit numbers.

e.g.

19

23

19 + 23 + 12 + 93 = 147

She was then asked to fill the squares (with 4 different numbers) so that the total is 100. And the funny bit: see how many ways you can do it.

Well I don't think you can do it at all. And there is some logic behind my assertion.

Good luck!

First the easy bit: simple addition practice. Imagine a square split into four smaller squares. She had to put 4 different numbers (1-9 only) in each square, then add up the four double digit numbers.

e.g.

19

23

19 + 23 + 12 + 93 = 147

She was then asked to fill the squares (with 4 different numbers) so that the total is 100. And the funny bit: see how many ways you can do it.

Well I don't think you can do it at all. And there is some logic behind my assertion.

Good luck!