The table shows the heights of Henry, Michael, and Stella. The average height of three children is 149 cm. The digit in the ones place of Henry's height and the digit in the tens place of Stella's height are covered by ink blots.
- What is the digit in the ones place of Henry's height?
- What is the digit in the tens place of Stella's height?
Total height of the three children
= 3 x 149
= 447 cm
Total height of Henry and Michael
= 447 - 137
= 310
310 - 170 - 102
= 38
= 3 tens 8 ones
(a) Digit in the ones place of Henry's height = 8
(b) Digit in the tens place of Stella's height = 3
Answer(s): (a) 8; (b) 3