Question

1. Ludwig Bump runs the bank in Mathsville. You have to help him, though, because he has

forgotten the combination number of the safe. Fortunately, he does remember some things

about the number which may help you to help him.

• The number has four digits (eg. 1234 or 9876).

• All the digits are different.

• It begins and ends with an odd number and has two even numbers in the middle.

· 19 and 519 go into it exactly

Answer 1

9861

Step-by-step explanation:

The last clue indicates that the solution is 19*519 = 9861. This value also satisfies the other clues, that is, it has four digits, all digits are different, it begins and ends with an odd number (9 and 1) and has two even numbers in the middle (8 and 6).