The table shows the heights of Benjamin, Emma, and Isaac. The average height of three children is 147 cm. The digit in the ones place of Benjamin's height and the digit in the tens place of Isaac's height are covered by ink blots.
- What is the digit in the ones place of Benjamin's height?
- What is the digit in the tens place of Isaac's height?
Total height of the three children
= 3 x 147
= 441 cm
Total height of Benjamin and Emma
= 441 - 141
= 300
300 - 130 - 105
= 65
= 6 tens 5 ones
(a) Digit in the ones place of Benjamin's height = 5
(b) Digit in the tens place of Isaac's height = 6
Answer(s): (a) 5; (b) 6