Question

Find a 4-digit odd number using each of the digits 1, 2, 4 and 5 only once such that when the first and the last digits are interchanged, it is divisible by 4.

Answer 1

4521 is the odd number using each of the digits 1, 2, 4 and 5 only once such that when the first and the last digits are interchanged, it is divisibleby 4.

Answer 2

Answer:

The possible numbers are : 4125 and 2415.

Step by step explanation :

Hey Mate,

We have to find the 4 digit odd number, from those digits  1, 2, 4 and 5.

We need to make a number, in which when the first and the last digits are interchanged, it is divisible by 4.

So,

Divisibility rule of 4  : If the last 2 digit of any number is divide by 4, then the whole number is divide by 4.

The number which divide by 4 from those digits (1, 2, 4 and 5) are : 12 and 24.

So, the possible numbers are : 4125 and 2415.