Question
Mathematics Question on Playing with Numbers
Which of the following numbers are prime?
A
23
B
51
C
37
D
26
Answer
23
Explanation
Solution
The prime numbers among the given options are:
(a) 23 is prime.
(b) 51 is not prime ; it can be factored into 3 x 17.
(c) 37 is prime.
(d) 26 is not prime ; it can be factored into 2 x 13.
So, the prime numbers are 23 and 37.