How many 3-digit numbers do not have an even digit or a zero?

60

80

125

150

Correct Answer : C

The remainder when 7^{84} is divided by 342 is

If X is an odd integer, which of the following must be odd?

1. 2x + x II. x + x + x III. x * x * x

The difference between the greatest number and the smallest number of 6 digits using all but