SSC CGL 2020 PYQ — Question 21

SSC CGL Tier II - Quant - 16 Nov 2020 • Quantitative Aptitude • Q21

Let x be the greater number which when divides 955, 1027, 1075 the remainder in each case is the same. Which of the following is NOT a factor of x?

Show answer & explanation

Correct answer: B

Explanation

The correct answer is option 2 i.e. 16.

Here we don't know about the remainder, but all three are equal so it may be 0. To ease problem-solving one must consider the rem as 0.

One can say that, x = HCF of (955 + 1027 + 1075).

HCF of (955 + 1027 + 1075) = HCF of (1075 - 1027, 1075 - 955, 1027 - 955)

HCF of (955 + 1027 + 1075) = HCF of (48, 120, 72)

HCF of (955 + 1027 + 1075) = 24.

Factor of 24 = 1, 2, 3, 4, 6, 8, 12, 24.

16 is not the factor of 24.