Real_Numbers_2024

If p and a are two distinct prime numbers, then their HCF is

• (a) 2

• (b) 0

• (c) Either 1 or 2

• (d)1

The LCM of the smallest two digit composite number and the smallest composite number is

• (a) 12

• (b) 20

• (c) 4

• (d) 44

The HCF of smallest prime number and the smallest composite number is

• (a)2

• (b) 4

• (c) 6

• (d)

The HCF of two consecutive positive integer is

• (a)0

• (b) 1

• (c) 4

• (d) 2

The sum of HCF and LCM of 12 , 21 , 15 is

• (a) 423

• (b) 420

• (c) 417

• (d) 140

If the LCM of two numbers is 3600, then which of the following numbers cannot be their HCF?

• (a) 600

• (b) 500

• (c) 400

• (d) 150

Given that HCF (2520,6600) = 40 and LCM(2520,6600) = 252 k , then the value of k  is

• (a)   1650

• (b)   1600

• (c) 125

• (d) 1625

if HCF (x,8) = 4 , LCM(x,8) = 24, then x is

• (a)8

• (b) 10

• (c)12

• (d) 14

The LCM and HCF of two rational numbers are equal, then the number must be

• (a) prime

• (b) co-prime

• (c) composite

• (d) equal

The ratio of LCM and HCF of the least composite number and the least prime number is

• 1 : 2

• 2 : 1

• 1 : 1

• 1 : 3