Practice the problems of Math in Focus Grade 5 Workbook Answer Key Chapter 7 Practice 5 Comparing Three Quantities to score better marks in the exam.

## Math in Focus Grade 5 Chapter 7 Practice 5 Answer Key Comparing Three Quantities

**Find the greatest common factor for each set of numbers.**

Question 1.

5, 10 and 20

Answer: The greatest number that divides 5, 10 and 20 is 5, So Greatest common factor of 5,10 and 20 is 5.

Question 2.

3, 9 and 15

Answer: The greatest number that divides 3, 9 and 15 is 3, So Greatest common factor of 3, 9 and 15 is 3.

Question 3.

6, 24 and 27

Answer: The greatest number that divides 6, 24 and 27 is 3, So Greatest common factor of 6, 24 and 27 is 3.

**Complete to express each ratio in simplest form.**

Question 4.

Answer: 4 : 3 : 2

Explanation:

Given,

All the numbers 16, 12 and 8 can be divided by 4 to get the simplest form in the ratio of 4 : 3 : 2.

Question 5.

Answer: 7 : 5 : 6

Explanation:

Given,

All the numbers 21, 15 and 18 can be divided by 3 to get the simplest form in the ratio of 7 : 5 : 6.

Question 6.

Answer: 4 : 6 : 9

Explanation:

Given,

All the numbers 20, 30 and 45 can be divided by 5 to get the simplest form in the ratio of 4 : 6 : 9.

Question 7.

Answer: 1 : 3 : 5

Explanation:

Given,

All the numbers 7, 21 and 35 can be divided by 7 to get the simplest form in the ratio of 1 : 3 : 5.

**Express each ratio in simplest form.**

Question 8.

4 : 16 : 18 ___ : ___ : ___

Answer:

All the numbers 4, 16 and 18 can be divided by 2 to get the simplest form in the ratio of 2 : 8 : 9.

Question 9.

27 : 12 : 21 __ : __ : ___

Answer:

Given,

All the numbers 27, 12 and 21 can be divided by 3 to get the simplest form in the ratio of 9 : 4 : 7.

Question 10.

32 : 8 : 20 = ___ : ___ : ____

Answer: All the numbers 32, 8 and 20 can be divided by 4 to get the simplest form in the ratio of 8 : 2 : 5.

Question 11.

63 : 1 8 : 27 = ___ : ___ : ___

Answer: All the numbers 63, 18 and 27 can be divided by 9 to get the simplest form in the ratio of 7 : 2 : 3.

**Complete.**

Question 12.

Answer:

All the numbers 2, 5 and 7 can be multiplied by 3 to get the simplest form in the ratio of 6 : 15 : 21.

Question 13.

Answer: All the numbers 3, 7 and 11 can be multiplied by 4 to get the simplest form in the ratio of 12 : 28 : 44.

Question 14.

Answer: All the numbers 20, 15 and 30 can be divided to get the simplest form in the ratio of 4 : 3 : 6.

Question 15.

Answer: All the numbers 32, 20 and 28 can be divided by 4 to get the simplest form in the ratio of 8 : 5 : 7.

**Complete.**

Question 16.

1 : 2 : 5 ___ : 6 : ___

Answer: All the numbers 1, 2 and 5 can be multiplied by 3 to get the ratio of 3 : 6 : 15.

Question 17.

7 : 4 : 3 = 28: ___ : ___

Answer: All the numbers 7, 4 and 3 can be multiplied by four to get the ratio of 28 : 16 : 12.

Question 18.

4 : 5 : 9 = ___ : 25 : ___

Answer: All the numbers 4, 5 and 9 can be multiplied by 5 to get the ratio of 20 : 25 : 45.

Question 19.

16 : 14 : 6 = ___ : ___ : 3

Answer: All the numbers 16, 14 and 6 can be divided by 2 to get the simplest form in the ratio of 8 : 7 : 3.

Question 20.

18 : 24 : 30 = ___ : 4 : ___

Answer: All the numbers 18, 24 and 30 can be divided by 6 to get the simplest form in the ratio of 3 : 4 : 5.

Question 21.

35 : 42 : 56 = 5 : ___ : ___

Answer: All the numbers 35, 42 and 56 can be divided by 7 to get the simplest form in the ratio of 5 : 6: 8.