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- 1. Multiple Choice
- Which of the following is a pair of co-primes ?
9 and 12
18 and 35
28 and 77
- 2. Multiple Choice
- Which of the following is a pair of twin prime ?
19 and 23
11 and 17
5 and 7
- 3. Multiple Choice
prime factorisation of 120
2 x 2 x 2 x 3 x 5
2 x 3 x 5 x 7
2 x 4 x 3 x 5
- 4. Multiple Choice
The smallest factor of 18 is _________________
3
6
2
9
- 5. Multiple Choice
Which of the following is a pair of co-primes ?
18 and 20
26 and 28
23 and 25
21 and 24
- 6. Multiple Choice
The smallest prime number after 40 is _______
43
42
41
47
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