Page 56 - NUMINO Challenge_K2

Problem solving

1 Find the two numbers from 1 to 10 that have a sum of 10

and difference of 2.

Two 9 8 7 6 5
Numbers 1

Sum 10 10 10 10 10
Difference 8

Tip

8 and 2 have a sum of
10 and difference of 6.

2 The sum of Mary’s and her brother’s age is 11, and the

difference is 3. How old is Mary? How old is her brother?

Mary 10

Brother 1

Sum 11 11 11 11 11

Difference 9

Tip

Complete the table by
decreasing Mary's
age by 1 in each
column.

53Problem Solving