Pattern questions that deals with constant increment can be solved using a certain "3-step method".
The pattern shown below, however, is not exactly showing a constant increment between every consecutive pattern.
Such questions are common in P6 Prelim Paper 2.
Calculator usage is allowed
| Pattern | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Tiles | 25 | 26 | 28 | 29 | 31 | 32 | 34 |
a) How many tiles will there be in pattern 11?
b) In which pattern will there be 145 tiles?
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| Mosaic tiles commonly used in swimming pools |





