Thursday

December 18, 2014

December 18, 2014

Posted by **MATH Help** on Monday, January 30, 2012 at 6:16pm.

- math -
**Reiny**, Monday, January 30, 2012 at 6:35pmThere are 900 of those counting numbers with no restriction.

Let's find all those that DON'T have a 2 in them

there are 8 possible in the left spot , (no 2 or 0)

but 9 anywhere else

number of counting numbers with NO 2 in them is

8x9x9 = 648

So 900 - 648 or 252 of them have at least one 2 in them.

**Answer this Question**

**Related Questions**

math - what fraction of the numbers from 1 to 1000 have the digit 7 as the least...

Discrete Math - Prove DeMorgan's Laws for sets? Let A, B, and C be sets. Then A...

Reiny/ MATH Help - THANK YOU VERY MUCH!!! I forgot to say thank you for this ...

math - the middle digit of a no between 100 and 1000 is 0 the sum of the other ...

math - How many times does each digit (0 through 9) appear in a list of ...

Math - what is the maximal number of consecutive 3-digit numbers that have at ...

math - Determine how many 1000 digit numbers A have the following property: When...

Math - What is the difference between counting the spaces between whole numbers ...

MATH Trouble - I have no idea what this problem means: For how many two-digit ...

Math - A book called The Penguin Dictionary of Curious and Interesting Numbers ...