Number system quiz 1

A ……… is a proven statement used for proving another statement.

• axiom

• theorem

• lemma

• algorithm

The product of non-zero rational and an irrational number is

• always rational

• always irrational

• rational or irrational

• one

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

• 0

• 1

• 2

• 3

Given that HCF(1152, 1664) = 128 the LCM(1152, 1664) is

• 14976

• 1664

• 1152

• none of these

The HCF of two numbers is 23 and their LCM is 1449. If one of the numbers is 161, then the

other number is

• 23

• 207

• 1449

• none of these

Which one of the following rational number is a non-terminating decimal expansion:

• 33/50

• 66/180

• 6/15

• 41/1000

The product of L.C.M and H.C.F. of two numbers is equal to

• Sum of numbers

• Difference of numbers

• Product of numbers

• Quotients of numbers

L.C.M. of two co-prime numbers is always

• product of numbers

• sum of numbers

• difference of numbers

• none

What is the H.C.F. of two consecutive even numbers

• 1

• 2

• 4

• 8

What is the H.C.F. of two consecutive odd numbers

• 1

• 2

• 4

• 8