The table shows the heights of Ethan, Audrey, and Isabella. The average height of three children is 144 cm. The digit in the ones place of Ethan's height and the digit in the tens place of Isabella's height are covered by ink blots.
- What is the digit in the ones place of Ethan's height?
- What is the digit in the tens place of Isabella's height?
Total height of the three children
= 3 x 144
= 432 cm
Total height of Ethan and Audrey
= 432 - 148
= 284
284 - 140 - 105
= 39
= 3 tens 9 ones
(a) Digit in the ones place of Ethan's height = 9
(b) Digit in the tens place of Isabella's height = 3
Answer(s): (a) 9; (b) 3