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

Answer: (b)

456 × 121 = 55176

Answer: (b)

By actual division, we find that 999999 is exactly divisible by 13.

The quotient 76923 is the required number.

Answer: (d)

Let the no. of Rs. 1 coins = x

and the no. of Rs. 2 coins = y

According to the question:

x + y = 50 ... (i)

x.1 + 2. y = 75 ... (ii)

on solving (i) and (ii), we get

2y – y = 75 – 50 ⇒ y = 25

put value of y in equation (i), we get

x = 50 – y

= 50 – 25 = 25

Hence, number of Rs. 1 and Rs. 2 coins are 25 and 25 respectively

Answer: (c)

11, 111, 1111, 11111, ...

1 Each number is divided by 4 then their remainder are always 3.

So, it can be written as = 4 m + 3

So statement is true.

2 No, this type of numbers are not squares.

So it is not true. Only 1 is true.

Answer: (c)

Let total number of seats in the stadium be p; number of seats in the lower deck be x and number of seats in upper deck be y.

∴ p = x + y, x = p/4, y = 3p/4

Now in the lower deck, 4x/5 seats were sold and x/5 seats were unsold.

No. of total seats sold in the stadium = 2p/3.

No. of unsold seats in the lower deck = x/5 = p/20

No. of unsold seats in the stadium = p/3

∴ Required fraction = ${p/20}/{p/3} = 3/20$