Question

the movement of the progress bar may be uneven because questions can be worth more or less (including zero) depending on your answer. which of the following numbers is prime? 102 97 33 65

Explanation:

Step1: Check divisibility of 102

102 is even, so $102 = 2 \times 51$, not prime.

Step2: Check divisibility of 97

Test divisibility by primes up to $\sqrt{97} \approx 9.8$. 97 is not divisible by 2, 3, 5, 7; it is prime.

Step3: Check divisibility of 33

$33 = 3 \times 11$, so not prime.

Step4: Check divisibility of 65

$65 = 5 \times 13$, so not prime.

Answer:

B. 97