D-D-R-S-C: Difference → Double Difference → Ratio → Squares → Cubes. Is order mein check karo, 90% series solve ho jayegi.
Number Series Tricks
SBI POIBPS POSSC CGLRRB
Yaad Karne ki List
- Difference Method (constant/increasing differences)
- Double Difference Method
- Ratio Method (multiply pattern)
- Square Series (n², n²±k)
- Cube Series (n³, n³±k)
- Fibonacci-type (previous two ka sum)
- Alternate Series (do patterns mixed)
- Prime Number Series
- Geometric Progression (×2, ×3)
- Mixed Operation Series (+2, ×3, +4, ×5...)
Mnemonic Tricks
Kaise Map Hota Hai
| Cue | Maps To |
|---|---|
| D (Difference) | Terms ke beech differences constant ya pattern mein hain? |
| D (Double Diff) | Differences constant nahi? To differences ka difference nikalo |
| R (Ratio) | Har term ko previous se divide karo — constant multiplier? |
| S (Squares) | Terms perfect squares ke paas hain? |
| C (Cubes) | Terms perfect cubes ke paas hain? |
Yeh Fast Kyun Hai
Banking exams mein 90% series in 5 patterns se banti hain. Order follow karo to time waste nahi hoga.
Aksar Poochhe Jaane Wale Sawaal
Banking exam mein number series kaise solve karein?
D-D-R-S-C order follow karo: Difference → Double Diff → Ratio → Squares → Cubes. 90% patterns cover ho jaate hain.
SBI PO mein kitne number series aate hain?
Prelims mein 5 questions, almost always wrong-number format mein. Practice se guaranteed marks hain.