ch-1 Real Number

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

• 4

• 2

• 5

• 0

If a is an odd number, b is not divisible by 3 and LCM of a and b is P then the LCM of 3a and 2b is:

• 5P

• 3P

• 6P

• 2P

What is the HCF of 3³ × 5 and 3² × 5²?

• 45

• 225

• 15

• 60

If P is prime number then, what is the LCM of P, P² , P³?

• P

• 0

• P³

The product of three consecutive positive integers is divisible by

• 4

• 6

• 5

• None of these

The LCM of two numbers is 1200. Which of the following cannot be their HCF?

• 600

• 500

• 400

• 200

If the HCF(26,169) = 13 then, LCM(26,169)=

• 26

• 52

• 338

• 13

The largest number that divides 70 and 125, which leaves the remainders 5 and 8, is:

• 65

• 15

• 13

• 25

The least number that is divisible by all the from 1 to 5 is:

• 70

• 60

• 90

• 80

The Muscle Gym has bought 63 treadmills and 108 elliptical machines. The gym divides them into several identical sets of treadmills and elliptical machines for its branches located throughout the city, with no exercise equipment left over. What is the greatest number of branches the gym can have in the city?

• 7

• 18

• 108

• 9