Posted by Linda Delorme on Sunday, November 4, 2007 at 12:31pm.
In both cases, the zeros are constant. The first number can vary 1-9 (since 00x or 000x are not numbers), while the last number can vary from 0-9. Thus there are 9 possibilities for the first number and 10 for the last.
You should be able to take it from here.
I hope this helps. Thanks for asking.
Related Questions
math - how many possible 3 digit numbers are there that have a middle zero? how ...
MATH Trouble - I have no idea what this problem means: For how many two-digit ...
Math. Explain - From the digits 1, 2, 3, and 4, how many positive integers are ...
math - Danielle has 4 hundreds,3 tens, and 6 ones blocks. Identify the greatest ...
algebra 2 - how many 7-digit phone numbers are possible if the first digit must ...
Math - A book called The Penguin Dictionary of Curious and Interesting Numbers ...
Math- Problem solving - A number has 4 digits. The digit in the hundredths place...
math - How many Seven-Digit numbers less than 1,048,000 can be using the digits ...
Math - How many seven digit numbers less than 1.048,000 can be made using the ...
Math - How many seven-digit numbers less than 1,048,000 can be made using the ...
For Further Reading
