4 Class Factors, Multiples, Prime Factorisation, LCM

Question 1

LCM of two co-prime numbers is product of them?

Answer 1

Yes

Question 2

Two consecutive numbers are always co-prime

Answer 2

Yes

Question 3

If two numbers are co-primes, at least one of them must be prime.

Answer 3

No

Question 4

All numbers which are divisible by 4 must also be divisible by 8.

Answer 4

No

Question 5

Which factors are not included in the prime factorisation of a composite number?

Answer 5

Factors which are composite numbers

Question 6

The product of three consecutive numbers is always divisible by 6.

Answer 6

Yes

Question 7

There are three numbers 15, 27, 87, The product of these numbers are divisible by 2,3,5,6?

Answer 7

Only 3 and 5 can divide the product exactly

Question 8

if a number has 4 factors A, B, C, D. So product of any of these two factors is also a factor of the number always?

Answer 8

No

Question 9

how to find LCM using prime factors

Answer 9

Count the different prime factors and their repetition. The product of these is the LCM

Question 10

Let’s say there are two numbers A and B. A is the factor of B. What is the LCM of A and B?

Answer 10

LCM of A and B is B

Question 11

all even numbers cannot divide all even numbers, right?

Answer 11

Yes

Question 12

all odd numbers cannot divide all odd numbers, right?

Answer 12

Yes

Question 13

All even numbers are not factors of all even numbers?

Answer 13

Yes