Odd One Out — Numbers

Joyful Mathematics 2 — Patterns Around Us / Fun with Numbers. Even/odd and skip-count patterns in Patterns Around Us match number odd-one-out tasks.

• Numbers can be grouped by odd/even, counting pattern, or size.
• Find the number that breaks the pattern.
• Check the gap between numbers.

Verbal: Look for a number pattern — odd/even, add the same amount, or skip counting.

Symbolic: 2, 4, 6, 7 → 7 is odd; others even. 10, 20, 30, 25 → breaks +10 rule.

Level 1 — Odd and even

2, 4, 6, 7 → 7 is odd; others even.

Level 1 — Same pattern

5, 10, 15, 18 → add 5 each time; 18 breaks (should be 20).

Level 2 — By digits

11, 22, 33, 45 → first two digits match in others.

Level 2 — Steps

1. Write differences 2) Spot wrong jump 3) Circle odd number

Indian real life

Connect this idea to your daily routine at home, school, or the local market in India.

Odd one out: 3, 5, 7, 8

Step 1 — 3, 5, 7 are **odd** numbers
Step 2 — 8 is **even**
Answer: 8

• Odd one: 10, 20, 30, 25
• Odd one: 1, 3, 5, 6
• Make a set where 12 is odd among 6, 9, 12, 15

Stretch: Make a set where 12 is odd among 6, 9, 12, 15 — state the rule you broke.

Revision tip: Write differences between neighbours — the wrong jump reveals the odd number.

Open the Practice tab for graded questions on Odd One Out — Numbers.