NCERT Solutions for Class 4th Maths Chapter 3 Patterns Around Us
Updated on 2026-09-19
About this chapter
Things arranged in a pattern can be counted block by block, pile by pile or line by line. That is quicker and safer than counting one by one. Shiv laid his coins out two by two with none left over. Numbers that pair off fully are called even numbers . Shirley’s coins always left one coin alone. Numbers that leave one out are called odd numbers . To tell them apart, look only at the ones digit . If it is 0, 2, 4, 6 or 8 the number is even. If it is 1, 3, 5, 7 or 9 it is odd. Counting numbers go even, odd, even, odd … for ever. So the two neighbours of any number are always of the other kind. From 1 to 100 there are 50 even numbers and 50 odd numbers — exactly the same many of each.
- Let Us Count
- Patterns with Money
- TWO WAYS
- Even numbers and odd numbers
- Crayons Arrangement
- Even and odd numbers, page numbers and neighbours
Quick revision
| Idea | What it means | How to check it | Example |
|---|---|---|---|
| Even number | All of them can be put in pairs, with none left over | Ones digit is 0, 2, 4, 6 or 8 | 30, 46, 78, 154, 300 |
| Odd number | One is always left out when you make pairs | Ones digit is 1, 3, 5, 7 or 9 | 67, 99, 415 |
| Counting in groups | Count one group, then add group by group | 9 blocks of 9 trees | 81 trees |
| Times-2 table | Every answer is an even number | 2, 4, 6, 8, 10, 12 … | 2 × 7 = 14, even |
| Neighbours of an odd number | Both are even | 6, 7, 8 | 6 and 8 are even |
| Neighbours of an even number | Both are odd | 7, 8, 9 | 7 and 9 are odd |
| Numbers in order | Even and odd take turns | 20, 21, 22, 23, 24 | even, odd, even, odd, even |
| 1 to 100 | 50 even and 50 odd | 2, 4, 6 … 100 makes 50 | Both the same many |
| Page numbers of a book | Left page even, right page odd | Open your book anywhere | 36 on the left, 37 on the right |
Exercises
- Let Us Count — Let Us Count Page 34
- Patterns with Money — Patterns with Money Page 35
- TWO WAYS — Two Ways Page 35
- Even numbers and odd numbers — In-text Questions Page 36
- Crayons Arrangement — Crayons Arrangement Page 37
- Even and odd numbers, page numbers and neighbours — In-text Questions Page 38