The table shows the heights of Riordan, Jacob, and Natalie. The average height of three children is 143 cm. The digit in the ones place of Riordan's height and the digit in the tens place of Natalie's height are covered by ink blots.
- What is the digit in the ones place of Riordan's height?
- What is the digit in the tens place of Natalie's height?
Total height of the three children
= 3 x 143
= 429 cm
Total height of Riordan and Jacob
= 429 - 132
= 297
297 - 140 - 103
= 54
= 5 tens 4 ones
(a) Digit in the ones place of Riordan's height = 4
(b) Digit in the tens place of Natalie's height = 5
Answer(s): (a) 4; (b) 5