Suzi needs to open her safe. She has forgotten the code! Luckily she had written these clues to the number in her maths book:
The digit total is a multiple of three
There are four digits
The digits are consecutive numbers
The 4-digit number is less than 4000
?
Can you find Suzi's code?
Suzi's code is
When you have made up a secret number of your own, make up some
clues.