The table shows the heights of Matthew, Mason, and Ava. The average height of three children is 143 cm. The digit in the ones place of Matthew's height and the digit in the tens place of Ava's height are covered by ink blots.
- What is the digit in the ones place of Matthew's height?
- What is the digit in the tens place of Ava's height?
Total height of the three children
= 3 x 143
= 429 cm
Total height of Matthew and Mason
= 429 - 143
= 286
286 - 160 - 101
= 25
= 2 tens 5 ones
(a) Digit in the ones place of Matthew's height = 5
(b) Digit in the tens place of Ava's height = 2
Answer(s): (a) 5; (b) 2