Question

it is a three digit
whose ten digit is 3
its hundred digit is 4 more than its one digit, which is an odd number less than 5

no two digits are the same

I need help on how to do this. too many years for mommy

Answer 1

if the digits are h,t,u for hundreds, tens, units, then the number is

hdu

Now, just start using the given info:

tens digit is 3, so

hdu = h3u

the ones digit is odd and less than 5. There are only two such numbers: 1 and 3. But 3 is already used, so

hdu = h31

Now, hundreds is 4 more than ones, so

hdu = 531