The square of 13 is 169. Take the last digit of the square, 9, and place it in the middle, making 196. This is the square of 14, the next number above 13. What are the next numbers which also have this property?
157 and 158
157^2= 24649, and 158^2= 24964
13 x 13 = 169 and 31 x 31 = 961. Can you find other numbers which give answers in reverse order when they are reversed and multiplied by themselves?
[] + [] + [] = 30
Fill the boxes using one of these numbers 1, 3, 5, 7, 9, 11, 13, 15
You can also repeat the numbers.