Question

A company places a seven-digit serial number on each part that is made. Each digit of the serial number can be any number from 0 through 9. Digits can be repeated in the serial number. How many different serial numbers are possible?

Answer 1

9999999 + 1

Answer 2

+ 1 because 0000000 is valid

Answer 3

9000000
i.e. 9 X 10 X 10 X 10 X 10 X 10 X 10

Answer 4

Wrong dude, sorry.

Answer 5

are the nos. starting with a zero allowed..???

Answer 6

yes..

Answer 7

oh..!!!! thnx...i didn't include them...!!!

Answer 8

I know.