189 pennies.
£1.92 (or $1.92, of you mean American penny)
The 3-digit counting numbers are 100 through 999 = 900 numbers.Half them are multiples of 2 (even numbers).The other half are not . . . 450 of them.
10,11,12,13,...,99
Zero.
There are 7200 such numbers.
1,000. The list looks just like the counting numbers from 000 to 999 .
There are 450 of them.
There are 720 of them.
8100
81
99 - 9 = 90
There are 6,750 such numbers.