Question

145. How many primes less than 100
have 7 as the ones digit?
(1) 4
(2) 5
(3) 6
(4) 7
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Answer 1

Answer:

(2)5

Step-by-step explanation:

Its 6

7,37,47,67,97

Answer 2

7,17,37,47,67,97

So there are 6 prime numbers less than 100.
Your answer is (3) 6

Hope it helps :)