The table shows the heights of Jack, Owen, and Claire. The average height of three children is 164 cm. The digit in the ones place of Jack's height and the digit in the tens place of Claire's height are covered by ink blots.
- What is the digit in the ones place of Jack's height?
- What is the digit in the tens place of Claire's height?
Total height of the three children
= 3 x 164
= 492 cm
Total height of Jack and Owen
= 492 - 135
= 357
357 - 170 - 108
= 79
= 7 tens 9 ones
(a) Digit in the ones place of Jack's height = 9
(b) Digit in the tens place of Claire's height = 7
Answer(s): (a) 9; (b) 7