What is the smallest five-digit number, whose digits are all different?

12345

Step-by-step explanation:

1,)select lowest whole number for ten-thousandth place

2.)not using numbers already used. select the next lowest whole number for thousands. place

3..)select the next lowest number for hundredths place

4.)select the next lowest whole number for tenths place

5.)select the next lowest whole number for the singles place

18a

step-by-step explanation:

simply because it is. it's the highest common factor

your answer is b ^w^ hope i