Problem
First name
Basma
School
Edith Neville Primary School
Country
Age
9
At first I realised that the first thing I had to work out was 2 numbers that add up to 15. So I wrote down some equations like 3+12=15 , 9+6=15 etc. Then I tried all of the equations and found 1 answer. I worked out the answer by adding 8 and 7. After 7 would be 13 because 7+13=20, then it would be 10. Cause 13+10=23 ,next is 6 10+6=16 . After that is 12 , 6+12=18. The final number is 9 , 12+9=21. So the final answer is 8,7,13,10,6,12 and 9.