Question

Which number should be subtracted from 321 so that it becomes prime? 1. 2 2. 4 3. 6 4. 9?

Answer 1

the answer is option 1- 2
coz the given number is a multiple of three and if we subtract 3, 6, 9 from the given number then the extracted number will remain a multiple of 3

Answer 2

Answer:

4 should be subtracted from 321 so that it becomes prime

Step-by-step explanation:

To Find: Which number should be subtracted from 321 so that it becomes prime?

Solution :

Definition of prime number : A prime number is a whole number greater than 1 whose only factors are 1 and itself

We are given a number 321

If we subtract 4 from 321

⇒ 321-4 =317

317 has two factors 1 and 317 itself .

So, 317 is a prime number

Hence  4 should be subtracted from 321 so that it becomes prime