What to notice
Every starting number is even and in the 3s. That gives a two-part test: a number divides by 6 with nothing left over only if it is even and its digits add to 3, 6 or 9. 54 is even and 5 + 4 = 9, so 54 ÷ 6 works; 64 is even, but 6 + 4 = 10, so it does not.
The 6s echo works backwards for the even answers. 6 × 4 = 24, 6 × 6 = 36 and 6 × 8 = 48, so the ones digit of the starting number is the answer: 24 ÷ 6 = 4, 36 ÷ 6 = 6, 48 ÷ 6 = 8.
The middle facts are the ones to watch: 36 ÷ 6, 42 ÷ 6 and 48 ÷ 6. They are the same facts children find hardest in the 6 times table.
How to practise at home
- Practise the matching multiplication fact first. If 6 × 7 is slow, 42 ÷ 6 will be slow too, so spend a few days on the times table.
- Use an egg carton, which has 6 cups to a row. Share 18 beads along one row, one cup at a time, and count one cup.
- Ask both questions for each fact: “how many 6s in 54?” and “what times 6 is 54?”
- Run the drill on this page, note which facts are slow, and practise those as multiplication facts for a few days.
- Use five-and-one-more backwards: 42 is 35 and 7, which is five 7s and one more 7, so 42 ÷ 6 = 7. Breaking the big number into a 5s answer and one more group helps a child who knows the 5s well.
Slips to watch for
- Mixing up 42 ÷ 6 and 48 ÷ 6, and answering 8 for 42 ÷ 6. Check with the multiplication: 6 × 8 = 48.
- Leaning on the test alone. 30 is even and its digits add to 3, so it divides by 6, but your child still needs to know it is five 6s.
- Answering 0 for 6 ÷ 6. Six shared among six is one each.