The table shows the heights of Rael, Emma, and Risa. The average height of three children is 162 cm. The digit in the ones place of Rael's height and the digit in the tens place of Risa's height are covered by ink blots.
- What is the digit in the ones place of Rael's height?
- What is the digit in the tens place of Risa's height?
Total height of the three children
= 3 x 162
= 486 cm
Total height of Rael and Emma
= 486 - 144
= 342
342 - 160 - 108
= 74
= 7 tens 4 ones
(a) Digit in the ones place of Rael's height = 4
(b) Digit in the tens place of Risa's height = 7
Answer(s): (a) 4; (b) 7