The table shows the heights of Sophia, Olivia, and Joseph. The average height of three children is 161 cm. The digit in the ones place of Sophia's height and the digit in the tens place of Joseph's height are covered by ink blots.
- What is the digit in the ones place of Sophia's height?
- What is the digit in the tens place of Joseph's height?
Total height of the three children
= 3 x 161
= 483 cm
Total height of Sophia and Olivia
= 483 - 140
= 343
343 - 170 - 105
= 68
= 6 tens 8 ones
(a) Digit in the ones place of Sophia's height = 8
(b) Digit in the tens place of Joseph's height = 6
Answer(s): (a) 8; (b) 6