Problem
First name
Dmitri+Ben
School
St Helen's CE Primary
Country
Age
11
10 1+0 =1 10-1=9
20 2+0 = 2 20 - 2 = 18
30 3+0 = 3 30 - 3 = 27
40 4+0 = 4 40 - 4 = 36
50 5 + 0 = 5 50-5 = 45
60 6+0 = 6 60 - 6 = 54
70 7 + 0 = 7 70 - 7 = 63
80 8 + 0 = 8 80 - 8 = 72
90 9 + 0 = 9 90 - 9 = 81
You will notice that all the answers are multiples of 9.
All the symbols next to the multiple of nine were the same.
Some numbers that had the same symbol were not multiples of 9.