Patterns online worksheet for Grade 5 - Free Printable

Let's solve each part of the Class 1 EVS Worksheet step by step. The task is to identify the pattern in each number sequence and fill in the missing numbers.

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(a)

Sequence: `20, 40, ___, ___, 100, ___, ___`

- From 20 to 40 → increase by 20
- So pattern: +20
- Continue:
- 40 + 20 = 60
- 60 + 20 = 80
- 80 + 20 = 100 ✔ (matches)
- 100 + 20 = 120
- 120 + 20 = 140

✔ Answer: 60, 80, 120, 140

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(b)

Sequence: `100, ___, 150, ___, ___, 225`

- 100 to 150 → difference = 50 over 2 steps → so likely increasing by 25
- Check: 100 → 125 → 150 → 175 → 200 → 225 ✔

So:
- 100 + 25 = 125
- 150 + 25 = 175
- 175 + 25 = 200
- 200 + 25 = 225

✔ Answer: 125, 175, 200

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(c)

`750, 700, 650, ___, ___, ___, ___, ___`

- 750 → 700 → decrease by 50
- 700 → 650 → decrease by 50
- So continue subtracting 50:
- 650 - 50 = 600
- 600 - 50 = 550
- 550 - 50 = 500
- 500 - 50 = 450
- 450 - 50 = 400

✔ Answer: 600, 550, 500, 450, 400

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(d)

`320, 300, 280, ___, ___, ___, ___, ___`

- 320 → 300 → decrease by 20
- 300 → 280 → decrease by 20
- Continue:
- 280 - 20 = 260
- 260 - 20 = 240
- 240 - 20 = 220
- 220 - 20 = 200
- 200 - 20 = 180

✔ Answer: 260, 240, 220, 200, 180

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(e)

Pentagons: `205, ___, ___, ___, 305, ___`

- Pattern: from 205 to 305 → difference = 100 over 4 steps → likely increase by 25 per step?
- Let’s check:
- 205 → ? → ? → ? → 305 → ?
- If 4 steps between 205 and 305 → total change = 100 → 100 ÷ 4 = 25 per step

So:
- 205 + 25 = 230
- 230 + 25 = 255
- 255 + 25 = 280
- 280 + 25 = 305 ✔
- 305 + 25 = 330

✔ Answer: 230, 255, 280, 330

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(f)

Triangles: `16, 20, ___, ___, 32, 36, ___`

- 16 → 20 → +4
- Then next should be +4 → 24, then 28
- Then 32, 36 → yes, +4 again
- So pattern: add 4

So:
- 20 + 4 = 24
- 24 + 4 = 28
- 36 + 4 = 40

✔ Answer: 24, 28, 40

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(g)

`270, 240, 210, ___, ___, ___, ___, ___`

- 270 → 240 → -30
- 240 → 210 → -30
- So subtract 30 each time
- 210 - 30 = 180
- 180 - 30 = 150
- 150 - 30 = 120
- 120 - 30 = 90
- 90 - 30 = 60

✔ Answer: 180, 150, 120, 90, 60

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(h)

`111, 121, 131, ___, ___, ___, ___, ___`

- 111 → 121 → +10
- 121 → 131 → +10
- So add 10 each time
- 131 + 10 = 141
- 141 + 10 = 151
- 151 + 10 = 161
- 161 + 10 = 171
- 171 + 10 = 181

✔ Answer: 141, 151, 161, 171, 181

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(i)

Stars: `99, 89, ___, ___, ___, 49, ___`

- 99 → 89 → -10
- So subtract 10 each time
- 89 - 10 = 79
- 79 - 10 = 69
- 69 - 10 = 59
- 59 - 10 = 49 ✔
- 49 - 10 = 39

✔ Answer: 79, 69, 59, 39

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(j)

Hexagons: `55, 60, ___, ___, ___, ___, ___`

- 55 → 60 → +5
- So add 5 each time
- 60 + 5 = 65
- 65 + 5 = 70
- 70 + 5 = 75
- 75 + 5 = 80
- 80 + 5 = 85

✔ Answer: 65, 70, 75, 80, 85

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✔ Final Answers:

(a) 60, 80, 120, 140
(b) 125, 175, 200
(c) 600, 550, 500, 450, 400
(d) 260, 240, 220, 200, 180
(e) 230, 255, 280, 330
(f) 24, 28, 40
(g) 180, 150, 120, 90, 60
(h) 141, 151, 161, 171, 181
(i) 79, 69, 59, 39
(j) 65, 70, 75, 80, 85

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These are all based on simple arithmetic patterns (adding or subtracting a constant). Great for Class 1 students to develop number sense! 🌟