The table shows the heights of Roshel, Matthew, and Leah. The average height of three children is 145 cm. The digit in the ones place of Roshel's height and the digit in the tens place of Leah's height are covered by ink blots.
- What is the digit in the ones place of Roshel's height?
- What is the digit in the tens place of Leah's height?
Total height of the three children
= 3 x 145
= 435 cm
Total height of Roshel and Matthew
= 435 - 139
= 296
296 - 170 - 103
= 23
= 2 tens 3 ones
(a) Digit in the ones place of Roshel's height = 3
(b) Digit in the tens place of Leah's height = 2
Answer(s): (a) 3; (b) 2