20 is written as product of prime as:
2 × 5
2 × 2 × 3 × 5
2 × 2 × 5
2 × 2 × 3
The least number which when divided by 9, 12, 16, 30 leaves in each case a remainder of 3 is:
720
723
823
750
Choose the Co-prime numbers from the following primes.
7 and 63
36 and 25
25 and 21
63 and 81
L.C.m of 17 and 5 is:
105
95
85
5
The sum of the first five multiple of 6 is
90
60
30
120
All numbers are multiples of
1
2
10
100
In the given numbers,which number is divisible by 3.
6583
6584
6582
6586
The numbers which have more than two factors are called.
Even
Prime
Composite
None of these
An example for twin primes is:
5, 11
3, 5
11, 17
3, 7
Number of prime numbers between 50 to 60 is:
3
4
