The table shows the heights of Julie, Rachel, and Harris. The average height of three children is 155 cm. The digit in the ones place of Julie's height and the digit in the tens place of Harris's height are covered by ink blots.
- What is the digit in the ones place of Julie's height?
- What is the digit in the tens place of Harris's height?
Total height of the three children
= 3 x 155
= 465 cm
Total height of Julie and Rachel
= 465 - 129
= 336
336 - 170 - 107
= 59
= 5 tens 9 ones
(a) Digit in the ones place of Julie's height = 9
(b) Digit in the tens place of Harris's height = 5
Answer(s): (a) 9; (b) 5