Question

How many six digit odd numbers can be formed from the digits 0, 2, 3, 5, 6, 7, 8, and 9 (repetition not allowed)?
A) 8640
B) 720
C) 3620
D) 4512

Answer 1

How many six digit odd numbers can be formed from the digits 0, 2, 3, 5, 6, 7, 8, and 9 (repetition not allowed)?
A) 8640
B) 720
C) 3620
D) 4512✅✅✅

Answer 2

Heyy mate ❤✌✌❤

total number of digits to be used 8

unit digit can hold any of the 4-digits; 3,5,7 or 9 for an odd digit

and 0 can't be the leading digit of the 6-digit number.

Therefore, (7*6*5*4*3*4)-(Number of cases when 0 is the 6th-digit)

Therefore, (7*6*5*4*3*4)-(6*5*4*3*4)

=10080-1440

=8640
✔✔✔