AI generatedNumberKey Stage 3

Finding missing digits using divisibility

Finding missing digits using divisibility.

  • For divisibility by 3 or 9, use the digit sum.
  • A missing digit can only be 0 to 9. There may be more than one answer.

Example 1

Find every possible missing digit so the number is divisible by 3.

Digit sumA number is divisible by 3 when its digit sum is divisible by 3.
Possible digitsTest digits from 0 to 9 only.

Example 2

Find every possible missing digit so the number is divisible by 9.

Digit sumA number is divisible by 9 when its digit sum is divisible by 9.
Possible digitsTest digits from 0 to 9 only.

Your turn

Question 1

Find every possible missing digit so the number is divisible by 3.

Check answer
Digit sumA number is divisible by 3 when its digit sum is divisible by 3.
Possible digitsTest digits from 0 to 9 only.
Question 2

Find every possible missing digit so the number is divisible by 9.

Check answer
Digit sumA number is divisible by 9 when its digit sum is divisible by 9.
Possible digitsTest digits from 0 to 9 only.
Question 3

Find every possible missing digit so the number is divisible by 3.

Check answer
Digit sumA number is divisible by 3 when its digit sum is divisible by 3.
Possible digitsTest digits from 0 to 9 only.
Question 4

Find every possible missing digit so the number is divisible by 9.

Check answer
Digit sumA number is divisible by 9 when its digit sum is divisible by 9.
Possible digitsTest digits from 0 to 9 only.
Question 5

Find every possible missing digit so the number is divisible by 3.

Check answer
Digit sumA number is divisible by 3 when its digit sum is divisible by 3.
Possible digitsTest digits from 0 to 9 only.
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