ML Aggarwal Playing with Numbers Exe-5.2 Class 8 ICSE Ch-5 Maths Solutions

ML Aggarwal Playing with Numbers Exe-5.2 Class 8 ICSE Ch-5 Maths Solutions. We Provide Step by Step Answer of  Exe-5.2 Questions for Playing with Numbers as council prescribe guideline for upcoming board exam. Visit official Website CISCE for detail information about ICSE Board Class-8.

ML Aggarwal Playing with Numbers Exe-5.2 Class 8 ICSE Maths Solutions

Board ICSE
Publications Avichal Publishig Company (APC)
Subject Maths
Class 8th
Chapter-5 Playing with Numbers
Writer ML Aggarwal
Book Name Understanding
Topics Solution of Exe-5.2 Questions
Edition 2023-2024

Playing with Numbers Exe-5.2

ML Aggarwal Class 8 ICSE Maths Solutions

Page-87

Find the values of the letters in each of the following and give reasons for the steps involved (1 to 11):
Question 1.

ml class 8 chapter 5.1 img 1

Answer :

12 – 5 = 7 = A

So, B = 8

ml class 8 chapter 5.1 img 2

Therefore, A = 7 and B = 8

Question 2.

ml class 8 chapter 5.1 img 3

Answer :

9 + 4 = 13, ∴ A = 4

B = 1 + 5 + 7 = 3

C = 1

ml class 8 chapter 5.1 img 4

Therefore, A = 4, B = 3, C = 1

Question 3.

ml class 8 chapter 5.1 img 5

Answer :

5 + 7 = 12, ∴ A = 7

1 + 2 + 7 = 10

1 + 4 + 2 = 7 = A

ml class 8 chapter 5.1 img 6

Therefore, A = 7


Playing with Numbers Exe-5.2

ML Aggarwal Class 8 ICSE Maths Solutions

Page-88

Question 4.

ml class 8 chapter 5.1 img 7

Answer :

A = 4 or 9

A ≠ 4 as A + A = A, 4 + 4 ≠ 4

A = 9

B = 1

ml class 8 chapter 5.1 img 8

Therefore, A = 9, B = 1

Question 5.

ml class 8 chapter 5.1 img 9

Answer :

5 + 7 = 12

∴ A = 5

B = 4, C = 6

ml class 8 chapter 5.1 img 10

Therefore, A = 5, B = 4, C = 6

Question 6.

ml class 8 chapter 5.1 img 11

Answer :

B = 3 or 8

If B = 8

1 + 1 + 7 = 9 then A = 7

C = 4 – 2 = 2

7 + 1 = 8 = B

ml class 8 chapter 5.1 img 12

Therefore, A = 7, B = 8, C = 2

Question 7.

ml class 8 chapter 5.1 img 13

Answer :

A = 7 (∵ 5 + 7 =12)

1 + 4 + 2 = 7(A)

∴ B = 2

1 + 2 + 5 = 8, C = 5

ml class 8 chapter 5.1 img 14

Therefore, A = 7, B = 2, C = 5

Question 8.

class 8 ml chapter 5.2 img 1

Answer :

A= 8, B=7, C= 4, D= 3

Question 9.

ml class 8 chapter 5.1 img 17

Answer :

A = 1 or 6 or 5 as 1 × 1 = 1

or 6 × 6 = 6

or 5 × 5 = 5

Taking A = 5

B = 8

ml class 8 chapter 5.1 img 19

Therefore, A = 5, B = 8

Question 10.

ml class 8 chapter 5.1 img 18

Answer :

B × B = B

B = 1, 6, 5

If B = 5, and A = 2, then

25 × 25 = 625

ml class 8 chapter 5.1 img 20

Therefore, A = 2 and B = 5

Question 11.

ml class 8 chapter 5.1 img 21

Answer :

A = 2 or 8

Let A = 2

ml class 8 chapter 5.1 img 22

Therefore, A = 2

Question 12.

class 8 ml chapter 5.2 img 2

Answer :

A= 6, B= 5, C= 4, D= 9

Question 13.

(a) In fig. (i) Fill in the numbers from 1 to 6 (without repetition) so that each side of the magic triangle adds up to 12.

(a) In fig. (ii) Complete the magic square given alongside using number 0, 1, 2, 3, ……., 15 (only once), so that sum along each row, column and diagonal is 30.

ml class 8 chapter 5.1 img 23ml class 8 chapter 5.1 img 24

Answer :

(i) Numbers 1 to 6 without repetition:

The sum from each side = 12

There can be much more solutions such as

ml class 8 chapter 5.1 img 25

(ii) In the magic square, the use of number 0, 1, 2, 3, ……….., 15

So, only once the sum along each row, column and diagonal is 30.

Some numbers are already filled.

ml class 8 chapter 5.1 img 26

3 + 8 + 4 = 15 + 15 = 30

3 + 12 = 5 + 10 = 30

3 + 14 + 0 = 17 + 13 = 30

0 + 6 = 9 + 15 = 30

0 + 7 + 12 = 19 + 11 =30

15 + 1 + 12 = 28 + 2 = 30

8 + 6 + 11 = 25 + 5 = 30

13 + 6 + 1 = 20 + 10 = 30

14 + 5 + 2 = 21 + 9 = 30

—  : End of ML Aggarwal Playing with Numbers Exe-5.2 Class 8 ICSE Maths Solutions :–

Return to –  ML Aggarwal Maths Solutions for ICSE Class -8

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