- #1
tofu
- 4
- 0
need help on this question!
How many #s are there btw 2000 and 9999 that
a. contain no repeating digits?
answer is 8x9x8x7 = 4032 ..right?
b. are even, if no repeition is allowed
from 0-9 there is 5 even #s
so its 7x8x7x5 = 1960 ? right?
How many #s are there btw 2000 and 9999 that
a. contain no repeating digits?
answer is 8x9x8x7 = 4032 ..right?
b. are even, if no repeition is allowed
from 0-9 there is 5 even #s
so its 7x8x7x5 = 1960 ? right?