number system Model Questions & Answers, Practice Test for ssc chsl tier 1 2023

Question :16

When $0. \ov 47$ is converted into a fraction the result is

Answer: (d)

$0.\ov47 = 47/99$

Question :17

What is the greater of two numbers whose product is 640, if the sum of the two numbers, exceeds their difference by 32 ?

Answer: (d)

Suppose the numbers are x and y

∵ xy = 640

and x + y = (x – y) + 32

x + y = x – y + 32

2y = 32 ⇒ y = 16

and $x =640/16 = 40$

So, largest number is 40.

Question :18

If three sides of a right angled triangle are integers in their lowest form, then one of its sides is always divisible by

Answer: (a)

Let the lowest sides of a right triangle be 3, 4, 5.

By Pythagoras theorem, $(3)^2 + (4)^2 = (5)^2$

Hence, one of its sides is always divisible by 5.

Question :19

If an amount of Rs. 72,128 is distributed equally amongst 46 persons how much amount would each person get?

Answer: (d)

Amount received by each person

= $72128/46$ = Rs.1568

Question :20

If we divide a positive integer by another positive integer, what is the resulting number?

Answer: (b)

When we divide a positive integer by another positive integer, the resultant will be a rational number i.e., in the form of p/q, where p and q are positive integers and q ≠ 0

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