SSC CGL Reasoning · Chapter Test
Number & Alphabet Series — 25-Question Test
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Formula Reference Sheet
This chapter
Patterns to scan, in order
| Constant difference | +k each term (AP) |
|---|---|
| Constant ratio | ×k each term (GP) |
| Growing difference | +1, +2, +3 … (look at 2nd differences) |
| Squares / cubes | 1,4,9,16 … or 1,8,27,64 … |
| Alternating | two interleaved series |
SSC reference
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