Problem
First name
Nuala
School
St Helens C of E School
Country
Age
11
The symbol that comes out of the machine is the symbol for the nine times table. It is in the 9x table because 10 (the first 2 digit number) add up to 1 so then 10-1=9. Then all of the teens are + 1 - 1 each time.
54 5+4=9 54-9=45 24 2+4=6 24-6=18 72 7+2=9 72-9=63
65 6+5=11 65-11=54
As you can notice the answers are all in the 9x tables!