+479 How many numbers less than 1000 are there that use only the digits of 2088?
+37146 I will assume you do not allow a leading zero
this will be a 3 digit number to be less than 1000
you have 3 choices for the first number (since we cannot use zero)
then you have 3 choices for the second number
and finally 2 choices for the third number
3 x 3 x 2 = 18 numbers BUT two of the choices are identical ('8' s)
so the options are divided by 2 18 / 2 = 9 numbers
Ok....incorrect...hmmmm
no leading zero so you have only two choices for the first digit 2 or 8
then you have three choices for the next digit
and two for the last digit 12 numbers (maybe?) Just kinda guessing now. 
2088
4 nCr 1 =3 - But leading zero does not count 0, 2, 8 =2
4 nCr 2 = 7 - But leading zeros do not count 02, 08, 20, 28, 80, 82, 88 =5
4 nCr 3 = 12 - But leading zeros do not count 028, 082, 088, 208, 280, 288, 802, 808, 820, 828, 880, 882 =9
Total = 2 + 5 + 9 = 16 possible numbers
+2095 Actually, the answer is 17.
1 digit possibilities: 0, 2, 8
2 digit possibilities: 28, 82, 20, 80, 88
3 digit possibilities: 208, 802, 288, 882, 808, 288, 280, 820
So, 3+5+9=17.
Is this correct?
+37146 What about 828 ? 880? Hmmmmm....
( i do not think '0' counts) ......
+2095 Sorry. I got the three digit possibilities wrong.
It's 288, 828, 288, 882, 288
Zero does count. It's less than 1,000, right?
