Divisibility rules for 5, 2, 3 and 9
Answers are for parents and teachers.
1
Write the largest three-digit number divisible by 5.
995
2
Calculate 4 × 53 × 25 conveniently.
5300
3
Check with the rule that 8 217 is divisible by 9, then work out 8 217 : 9.
913
4
Which digit replaces the star so that 52* is divisible by both 2 and 5?
0
5
From 18, 25, 39, 44, 57, 61 write those divisible by 3.
18, 39, 57