Question

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Answer 1

Answer:

1. 1×3 =3 it is a prime no.

2. 2×2+1 = 5 it is a prime no.

I think 2 ex. can help u.....

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

2 × 3 + 1 = 7

we multiply 2 and added 1 with 3 to get a prime number.

some more prime number by this types

(a) 2 × 8 + 1 = 17

(b) 2 × 6 + 1 = 13

(c) 2 × 9 + 1 = 19

So, 13,17 and 19 are prime number ..

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