The table shows the heights of Claire, Gavin, and Olivia. The average height of three children is 153 cm. The digit in the ones place of Claire's height and the digit in the tens place of Olivia's height are covered by ink blots.
- What is the digit in the ones place of Claire's height?
- What is the digit in the tens place of Olivia's height?
Total height of the three children
= 3 x 153
= 459 cm
Total height of Claire and Gavin
= 459 - 150
= 309
309 - 170 - 101
= 38
= 3 tens 8 ones
(a) Digit in the ones place of Claire's height = 8
(b) Digit in the tens place of Olivia's height = 3
Answer(s): (a) 8; (b) 3