Answer:
- The number has seven digits.
_ _ _ _ _ _ _
- The number is more than 4 million but less than 5 million.
4 _ _ _ _ _ _
- The ten thousands digit is the number of sides of a triangle.
4 _ 3 _ _ _ _
- The ones digit is half the hundreds digit.
- The hundred thousands is 99 + 11.
4 2 3 _ _ _ _
- The hundreds digit is 25% the thousands digit.
- The thousands digit is double the millions digit.
4 2 3 8 _ _ _
- The tens digit is the millions digit less double the ones digit.
Now , according to the 6th step ,
4 2 3 8 6 _ _
According to the 4th step ,
4 2 3 8 6 _ 3
and finally , according to the last step ,
4 2 3 8 6 5 3
hope helpful! :)