Question

Q 1 - Which of the following is a prime number?
A - 187
B - 811
C - 341
D - 437

Answer 1

Answer:

D is the answer.....

Mark as brainlist

Answer 2

Answer:

B

Step-by-step explanation:

Step 1. Find a whole number k such that k2 > n for each number.

142 > 187.

302 > 811.

192 > 341.

212 > 437.

Step 2. Get all prime numbers which are < k

14 - 2 , 3, 5, 7, 11, 13

30 - 2 , 3, 5, 7, 11, 13, 17, 19, 23, 29

19 - 2 , 3, 5, 7, 11, 13, 17

21 - 2 , 3, 5, 7, 11, 13, 17, 19

Step 3. Check divisiblity of each number

with prime numbers which are < k.

187 is divisible by 11.

811 is not divisible by any prime number.

341 is divisible by 11.

437 is divisible by 19.

Result: 811 is the prime number.