Posted by Ana on .
How many sevendigit numbers less than 1,048,000 can be made using the digits 0,1,4,6,7,8, and 9? Make a list of possible ways to represent your sevendigit numbers.

Math 
MathMate,
The constraints are:
1. the number has to have 7 digits (i.e. the first digit cannot be zero)
2. the resulting number cannot be more than 104800.
Starting from the leftmost digit, ask yourself which digits will fit the constraints.
Continue this way for the remaining digits. If there is more than one choice, make a list of each possibility, and work on each separately. 
Math 
joy,
2x9x9x9x9x9x9