Question
Fri March 13, 2015 By: Kamesh Rao

Write the three pairs of co-primes between 15 & 30.

Expert Reply
Vimala Ramamurthy
Sat March 14, 2015
Co prime numbers do not have common factors except 1.
Thus, 4 and 9 are co prime numbers.
8 and 9 are co prime numbers.
 
We need to find co prime numbers between 15 and 30
15 and 16, 17, 19, 22, 23, 26, 28, 29
16 and 17, 19, 21, 23, 25, 27, 29
17 and 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30
18 and 19, 23, 25, 29
19 and 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30
20 and 21, 23, 29
21 and 22, 23, 25, 27, 29
22 and 23, 25, 27, 29
23 and 24, 25, 26, 27, 28, 29
24 and 25, 29
25 and 26, 27, 28, 29
26 and 27, 29
27 and 28, 29
28 and 29
29 and 30
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