A Story of Numbers Class 8 Short Question Answer

A Story of Numbers Class 8 Short Question Answer

A Story of Numbers Class 8 Short Question Answer

Question 1.

Write the numeral of of Mayan system is decimal system.

Solution:

Number is 2 × 360 + 1 × 20 + 1 × 1

= 720 + 20 + 1 = 741.

Question 2.

Write the decimal number 13 in base-2 system.

Solution:

13 = 8 + 4 + 1

= 2³ + 2² + 0 + 2¹ + 1

= 1101.

Question 3.

Write the sum DXVIII + CCCLI Roman numerals in Roman numerals.

Solution:

The sum = D + X + V + III + CCC + L + I

= D + CCC + X + V + III + I

= DCCCX + (V + III + I)

= DCCCXIX

Question 4.

Find the sum = in decimal system.

Solution:

Required sum is equal to 2 zongs 6 hengs 6 zongs + 7 zongs 6 hengs 3 zongs

= 2 × 100 + 6 × 10 + 6 × 1 + 7 × 100 + 6 × 10 + 3 × 1

= 200 + 60 + 6 + 700 + 60 + 3

= 900 + 120 + 9 = 1029.

Question 5.

Find the product (ukasar-ukasar- ukasar-urapon) × (ukasar-ukasar-ukasar).

Solution:

The required product

= (2 +2 + 2 + 1) × (2 + 2 + 2)

= 7 × 6 = 42.