Question

Consider the numbers 0, 10, 20, 30, and 40. Multiply each by 4 and compare the result to 60 to determine into which of the following intervals? What number can you multiply by 4 and then add 8 to the product to get?

a. 0 to 10.b. 10 to 20.c. 20 to 30.d. 30 to 40.

Answer 1

Option (b) 10 to 20

Explanation:

Let the number obtained between the interval be 'x'

Therefore,

according to the question:

multiplying the number with 4 and then adding 8 to it to get 60

thus,

mathematically, we get

4x + 8 = 60

or

4x = 60 - 8

or

4x = 52

or

x = 13

Hence,

The 13 lies between the interval 10 to 20

Option (b) 10 to 20