Number Play Class 7 Extra Questions Maths Chapter 6

During revision, students quickly go through Class 7 Maths Extra Questions Chapter 6 Number Play Class 7 Extra Questions with Answers for clarity.

Class 7 Number Play Extra Questions

Class 7 Maths Chapter 6 Number Play Extra Questions

Class 7 Maths Chapter 6 Extra Questions – Number Play Extra Questions Class 7

Question 1.
Find the number sequence formed when the given arrangements are changed as mentioned below.

(a) BFECDAG
(b) FBCEADG
(c) FDGBCEA
Solution:
(a) 0022153
(b) 0123413
(c) 0122456

Question 2.
F ind out the parity for the product of two (a) odd numbers and (b) even numbers.
Solution:
(a) Product of two odd numbers: The parity for the product of two odd numbers is always odd.
Example: 3 × 5 = 15 (odd number).

(b) Product of two even numbers: The parity for the product of two even numbers is always even.
Example: 4 × 6 = 24 (even number).

Question 3.
Find the parity of the number of small squares in grids of the given dimensions without calculating the product.
(a) 23 × 19
(b) 62 × 26
(c) 124 × 271
Solution:
(a) Both 23 and 19 are odd numbers, and Odd × Odd = Odd.
So, the parity of the number of small squares is odd.

(b) Both 62 and 26 are evfen numbers, and Even × Even = Even.
So, the parity of the number of small squares is even.

(c) 124 is even, 271 is odd, and Even × Odd = Even.
So, the parity of the number of small squares is even.

Question 4.
Create a magic square whose magic sum is 51.
Solution:

Question 5.
Fill in the grids below:

Solution:

Solution:

Question 6.
What is the parity of the sum of numbers from 1 to 200?
Solution:
The sum from 1 to 200 is given by:

Thus, the sum of numbers from 1 to 200 is 20100. Since 20100 is an even number, the parity is even.

Question 7.
Solve these cryptarithms:

Solution:

Solution:

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