lcm and hcf Model Questions & Answers, Practice Test for ibps rrb clerk asst multipurpose prelims 2024

Answer: (b)

Since, 1.16666... and 1.454545... are recurring numbers and we know that recurring numbers represent rational numbers.

So, that I and IV are rational numbers.

Answer: (a)

As (x + k) is HCF

∴ F(–k) = $k^2 – 5k + 6 = k^2$ – 8k + 15

⇒3k = 9⇒k = 3

Answer: (a)

As, HCF of two numbers are 12.

Let two numbers are12a and 12b

then,12a × 12b = 2160 Þ ab = 15

∴ sets of numbers are (1, 15) and (3, 5)

means of set of numbers are 8 and 4

means of means = 6

∴ Req. number = 6 × 12 = 72

Answer: (c)

Answer: (b)

HCF of m and n is 1.

∴ HCF (m + n, m) = 1

and HCF (m – n, n) = 1