Question

I am a multiple of 10.my factors incluide an even number and an odd number. i am greater than 3x5 and less,than 4x7. what number am i?

Answer 1

3×15=15
4×7=28
The only multiple of 10 between these two numbers is 20. 20 does indeed have factors that are odd or even so we can conclude that 20 must be the answer.