So that leaves two out of the remaining digits, 0, 5, 7. Of these 5 and 7 are odd so must occupy the ones place. Therefore, we have 405, 407, 457 and 475 in the range 400-499.

Then we have 507 and 547. Next we start with 7 and we have 705 and 745.

So altogether we have 8 numbers: 405, 407, 457, 475, 507, 547, 705, 747.

- All categories
- Pre-Algebra Answers 12,219
- Algebra 1 Answers 25,108
- Algebra 2 Answers 10,373
- Geometry Answers 5,131
- Trigonometry Answers 2,627
- Calculus Answers 5,912
- Statistics Answers 2,998
- Word Problem Answers 9,915
- Other Math Topics 6,455

80,738 questions

84,724 answers

2,107 comments

68,309 users