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Which one of the following is not a prime number?

31
61
71
91
Explanation:

91 is divisible by 7. So, it is not a prime number.
Additional Questions

(112x54)=?;

Answer

It is being given that (232 + 1) is completely divisible by a whole number. Which of the following numbers is completely divisible by this number?

Answer

What least number must be added to 1056, so that the sum is completely divisible by 23 ?

Answer

1397 397 = ?

Answer

How many of the following numbers are divisible by 132 ?
264, 396, 462, 792, 968, 2178, 5184, 6336

Answer

The difference of two numbers is 1365. On dividing the larger number by the smaller, we get 6 as quotient and the 15 as remainder. What is the smaller number ?

Answer

If the number 517 * 324 is completely divisible by 3, then the smallest whole number in the place of * will be:

Answer

The Probability that a number selected at random from the first 50 natural numbers is a composite number is:

Answer

A coin tossed live times. What is the probability that there is at least one tail?

Answer

If a number is chosen at random from the set {1,2,3,……100}, then the probability that the chosen number is a perfect cube is?

Answer
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