Sunita checks whether 97 is prime. She tests division by 2, 3, 5 and 7 only. She knows she does not need to test bigger numbers because the next prime, 11, has 11x11 = 121 which is already more than 97. Using her method, is 97 prime?

Question

Accepted Answer

Yes, 97 is prime. 97 is not divisible by 2, 3, 5 or 7. Since 11x11 = 121 > 97, no larger prime can divide it. Hence 97 is prime.

Sunita checks whether 97 is prime. She tests division by 2, 3, 5 and 7 only. She knows she does not need to test bigger numbers because the next prime, 11, has $11 \times 11 = 121$ which is already more than 97.
Using her method, is 97 prime?

Step-by-Step Solution

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More Class 6 Prime and Composite Numbers practice

Sunita checks whether 97 is prime. She tests division by 2, 3, 5 and 7 only. She knows she does not need to test bigger numbers because the next prime, 11, has 11×11=121 which is already more than 97. Using her method, is 97 prime?

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 6 Prime and Composite Numbers practice

Sunita checks whether 97 is prime. She tests division by 2, 3, 5 and 7 only. She knows she does not need to test bigger numbers because the next prime, 11, has $11 \times 11 = 121$ which is already more than 97.
Using her method, is 97 prime?