How many even 3-digit numbers can be formed from digits 1 2 3 5 if each digit can be used only once?

Answer 1

For the first digit there would be 4 options

For the second digit there would be 3 options

for the third digit there would be 2 options

Thus 4*3*2 = 24 three digit numbers can be formed if each digit can only be used once in a 3 digit number made.