Question

How many different 5-digit whole

numbers can be made using the
digits: 2,3,4,5, and 6 when each
digit can be used once only?

Answer 1

120

Explanation:

so

?????

this 5 interrogative marks are our 5 digit number

for the first place you have 5 choices(2, 3, 4, 5, 6)

for the second:4

for the third:3

for the fourth:2

and for the fifth:1

you multiply this choices

5×4×3×2=120