The factors of 21 are
1,3,7,21
1,3,6,21
2,3,7,21
1,7,21
L.C.M of 36 and 72 is:
36
72
108
2
The two numbers which have only 1 as their common are called:
Co-primes
Twin prime
Composite
None of these
Prime factors of 140 are:
2 × 2 × 7
2 × 2 × 5
2 × 2 × 5 × 7
2 × 2 × 5 × 7 × 3
76
31
48
95
L.C.M of two Co-prime numbers is their:
Sum
Difference
Product
Quotient
The HCF of two number is 28 their LCM is 336. If one number is 112 then the other number is:
64
84
34
Choose the Co-prime numbers from the following.
7 and 63
36 and 25
25 and 21
63 and 81
Write four multiples of 5
5, 10, 15, 20
1, 5, 10, 15
1, 10, 15, 20
0, 1, 5, 10
HCF of two numbers
Product of numbers ÷ their L.C.M
Product of numbers × their L.C.M
Product of numbers
