hcf and lcm

Front

Which of the following numbers is not a factor of 68? Options: 2, 4, 17, 6

Back

6

Answer explanation

factors of 68 are 1,2,4,17,34,68

Front

The smallest prime number is

Back

2

Front

The smallest composite number is

Back

4

Front

1 is

Back

neither prime nor composite

Front

The least prime number between 1 and 10 is

Back

2

Front

The greatest common factor of 8 and 20 is

Back

4

Front

Which of the following pairs of number are not co-prime? Options: 7 , 15; 12 ,49; 18 , 23; 12 , 21

Back

12 , 21

Front

The greatest common factor of 5, 15 and 25 is

Back

5

Front

LCM of 6 and 18

Back

18

Front

Smallest 3-digit number divisible by 6, 8, and 12.

Back

120

Answer explanation

lcm of 6 , 8 and 12 is 24

multiples of 24 are 24,48,72,96,120,144

smallest 3 digit number which is divisible by 6,8 and 12 is 120