Question

Alan has forgotten his 4-digit PIN code.

He knows it begins with a 2 and the 4 digits make an odd number.
How many different sets of 4 digits could it be?

Answer 1

500 possibles

Explanation:

First number 2 <==== one choice

Second number 10 choices ( 0 - 9 )

Third number 10 choices ( 0 - 9)

Fourth number 5 choices ( 1,3,5,7,9 )

1 x 10 x 10 x 5 = 500 possibles