Question

For what value of n,4n ends with 0
(a) 10. (b) when n is even
(c) when n is odd (d) no value of n
what is the ans.
& why ?​

Answer 1

Answer:

If the last digit of a number or 1 digit of a number end with 9,7,5,3,1 so it is odd and number who ends in 0,8,6,4,2 so it even

Answer 2

Answer:

Option (d) is the answer that is no value of n.

Step-by-step explanation:

Option (d) is the answer because for any number to end with digit zero it should have prime factors as 2 and 5 necessarily but since 4 only contains 2 as a prime factor there is no value of n where 4 will end with digit zero.

Note: If the prime factorisation of any number contains 2, 5 and any other number with 2 and 5 it will end with digit zero!