Question

If (a) is a prime number, which of the following is (b)? when a=b+5?
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Answer 1

Answer:

2, 6… ?

Step-by-step explanation:

example a is 7, b is 2,

Answer 2

The answer is quite simple.

2 is the only even prime.

Only one of $\rm a$ or $\rm b+5$ equals 2.

Since b should be less than a,

$\rm\therefore b=2$

$\rm\therefore a=7$