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Question

It is Samaira's birthday, she has bought chocolates for all her 40 classmates, and each student has been given a position to sit which is labeled from 1 to 40. She has bought two kinds of chocolates, one Dairy Milk and the other Munch. She gives Dairy Milk to those who are at the seats labelled a prime number. How many children will get Dairy Milk chocolates?
  1. 11

  2. 12

  3. 13

  4. 21


Solution

The correct option is B

12


As the students who are sitting in the positions numbered by the prime numbers get Dairy Milk, we have to first know the number of prime numbers from 1 to 40.

The prime numbers are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37. Clearly, we can see that there are 12 prime numbers, so 12 students will get Dairy Milk chocolates. The number 1 is not a prime number. 1 is neither a prime nor a composite number.

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