Question

The number of students at jefferson school is even. The number has three digits. The digit in the ten place is 4. write there number that could be how many students are there at jefferson school. Explain how many you know your answer are correct.

Answer 1

Let's assign three blanks for each digit of the unknown number. But let's fill in the tens digit because it is already specified.

_ 4 _

The last digit should be even to make it even. The possible digits for this are 2, 4, 6, and 8. The first digit could be any digit from 1 to 9. Therefore, the possible answers are

142 242 342 442 542 642 742 842 942
144 244 344 444 544 644 744 844 944
146 246 346 446 546 646 746 846 946
148 248 348 448 548 648 748 848 948

Therefore, there are a total of 36 possible answers.