# Sarin and the million numbers part 13(Math Question)

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Read posting Sarin and the million numbers and to understand the mathematics concept of numbers.

Read also posting on Sarin learns concept of ratio in school and to understand Ratio and Fraction.

Upper primary school mathematics question UPQ68

UPQ68-1.  What is the missing number on the line?

108 : _____ = 9 : 8

(1) 109

(2) 96

(3) 86

(4) 72

UPQ68-2.   Hairu is 3/8 as old as Sarin. Find the ratio of Sarin’s age to their total age.

(1) 3 : 8

(2) 8 : 3

(3) 3 : 11

(4) 8 : 11

UPQ68-3.   The ratio of Hairu’s mass to Sarin’s mass is 7 : 10. If Sarin is 12 kg heavier than Hairu, what is their

total mass?

(1) 28 kg

(2) 40 kg

(3) 67 kg

(4) 68 kg

UPQ68-4.   Fatimah bought a pizza. She ate 2/5 of it and shared the remaining portion of the pizza equally with

her 2 brothers. What fraction of the pizza did each of her brother eat?

Solutions

UPQ68-1.  What is the missing number on the line?

108 : _____ = 9 : 8

(1) 109

(2) 96

(3) 86

(4) 72

108 = 9 × 12

9 : 8 = 9 × 12 : 8 × 12 = 108 : 96

108 : 96 = 9 : 8

UPQ68-2.   Hairu is 3/8 as old as Sarin. Find the ratio of Sarin’s age to their total age.

(1) 3 : 8

(2) 8 : 3

(3) 3 : 11

(4) 8 : 11

Their total age = 3 + 8 = 11 units

Sarin’s age  = 8 units

The ratio of Sarin’s age to their total age = 8 : 11

UPQ68-3.   The ratio of Hairu’s mass to Sarin’s mass is 7 : 10. If Sarin is 12 kg heavier than Hairu, what is their

total mass?

(1) 28 kg

(2) 40 kg

(3) 67 kg

(4) 68 kg

3 units = 12kg

1 unit = 4kg

Total mass = 17 × 4 = 68kg

UPQ68-4.   Fatimah bought a pizza. She ate 2/5 of it and shared the remaining portion of the pizza equally with

her 2 brothers. What fraction of the pizza did each of her brother eat?

Each of her brother ate 1/5 fraction of the pizza.

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### 2 responses »

1. It is in Upper primary school category