8+16+24+32+40 = 120/5 = 24
5 × 5 = 25
25 × 5 = 125
125 × 5 = 625
625 × 5 = 3125
3125 × 5 = 15625Last updated by NA on 04-11-2026
Series: 2, 4, 6, 8, ?
This is +2 series.
2 + 2 = 4
4 + 2 = 6
6 + 2 = 8
8 + 2 = 10
Last verified on 04-11-2026
Find the differences:
6 − 2 = 4
12 − 6 = 6
20 − 12 = 8
30 − 20 = 10
42 − 30 = 12
The differences increase by 2 each time.
Next difference = 14
42+14=56
Last updated on 30 Oct 2026
10, 100, 200, 310, ?
Differences:
- 100 − 10 = 90
- 200 − 100 = 100
- 310 − 200 = 110
- Next difference = 120
Missing number = 310 + 120 = 430
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