Divisibility tests: 10, 5, 2, 9 and 3
Answers are for parents and teachers.
1
Write the largest three-digit number divisible by 10.
990
2
Is 12,345 divisible by 3? By 9? Explain with the digit sum.
1 + 2 + 3 + 4 + 5 = 15: divisible by 3, not by 9.
3
Which three-digit numbers made from the digits 1, 2, 5 (each once) are divisible by 2?
152 and 512
4
1,530 notebooks were tied into bundles of 10. How many bundles?
153
5
Divide 126 by 9. Also check that 126 is divisible by 9 using the digit sum.
14