AC9M4N02 • Practice

Properties of Odd and Even Numbers

An even number can be arranged into pairs with no remainder; an odd number leaves one unpaired. Parity follows predictable patterns under addition, subtraction and multiplication.

SkillrHub quiz practice is built for curriculum-aligned revision with answer feedback and a clear review path.

Quick preparation

  • An even number can be arranged into pairs with no remainder; an odd number leaves one unpaired. Parity follows predictable patterns under addition, subtraction and multiplication.
  • Use this routine: Pair the quantity → Identify parity → Test an operation → Generalise → Justify.
  • Odd + odd gives an even total because the two unpaired counters make a pair.

SkillrHub Practice guide

Use this short shuffled practice set to check the skill, read feedback and review missed items. Repeat quiz practice to access more of the full question bank over time.

Model: Six pairs use 12 counters. The thirteenth counter has no partner, so 13 is odd.
  • Worked example: 17 counters make 8 pairs with 1 counter left over, so 17 is odd. If two odd groups are joined, their two leftover counters form a pair, making an even total.
  • Common mistake: Zero is an even number: it leaves no unpaired counter. Do not assume an even result means both starting numbers were even.
  • Assessment guidance: Use this short shuffled set for one attempt. Repeat quiz practice to get access to more of the full question bank over time.
  • Review: Use pairs or equal rows to explain an odd/even rule, then check it with examples.
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