The table shows the heights of Jack, Ella, and Tommy. The average height of three children is 137 cm. The digit in the ones place of Jack's height and the digit in the tens place of Tommy's height are covered by ink blots.
- What is the digit in the ones place of Jack's height?
- What is the digit in the tens place of Tommy's height?
Total height of the three children
= 3 x 137
= 411 cm
Total height of Jack and Ella
= 411 - 127
= 284
284 - 140 - 108
= 36
= 3 tens 6 ones
(a) Digit in the ones place of Jack's height = 6
(b) Digit in the tens place of Tommy's height = 3
Answer(s): (a) 6; (b) 3