The table shows the heights of Lily, Jack, and Isaac. The average height of three children is 150 cm. The digit in the ones place of Lily's height and the digit in the tens place of Isaac's height are covered by ink blots.
- What is the digit in the ones place of Lily's height?
- What is the digit in the tens place of Isaac's height?
Total height of the three children
= 3 x 150
= 450 cm
Total height of Lily and Jack
= 450 - 130
= 320
320 - 170 - 102
= 48
= 4 tens 8 ones
(a) Digit in the ones place of Lily's height = 8
(b) Digit in the tens place of Isaac's height = 4
Answer(s): (a) 8; (b) 4