The table shows the heights of Oliver, Evan, and Anthony. The average height of three children is 155 cm. The digit in the ones place of Oliver's height and the digit in the tens place of Anthony's height are covered by ink blots.
- What is the digit in the ones place of Oliver's height?
- What is the digit in the tens place of Anthony's height?
Total height of the three children
= 3 x 155
= 465 cm
Total height of Oliver and Evan
= 465 - 120
= 345
345 - 160 - 106
= 79
= 7 tens 9 ones
(a) Digit in the ones place of Oliver's height = 9
(b) Digit in the tens place of Anthony's height = 7
Answer(s): (a) 9; (b) 7