The table shows the heights of Rachel, Tommy, and Michael. The average height of three children is 146 cm. The digit in the ones place of Rachel's height and the digit in the tens place of Michael's height are covered by ink blots.
- What is the digit in the ones place of Rachel's height?
- What is the digit in the tens place of Michael's height?
Total height of the three children
= 3 x 146
= 438 cm
Total height of Rachel and Tommy
= 438 - 134
= 304
304 - 170 - 102
= 32
= 3 tens 2 ones
(a) Digit in the ones place of Rachel's height = 2
(b) Digit in the tens place of Michael's height = 3
Answer(s): (a) 2; (b) 3