Question

7. Which of the following is not a prime number? (a) 107
(b) 173 (c) 51 (d) 163​

Answer 1

Answer:

51 is divisible by 3

so it is not a prime number

And : (c)51

Answer 2

Answer:

a)1+0+7=8

b)1+7+3=11

c)5+1=6

d)1+6+3=10

Therefore 107,51,163 are not prime numbers.

Step-by-step explanation:

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