1.5, 2.3, 3.1, 3.9, ?
- 4.2
- 4.4
- 4.5
- 4.7
Explanation
In this simple addition series, each number increases by 0.8.
Rule = (1st no.) (1st no. + 0.8 = 2nd no.) (2nd no. + 0.8 = 3rd number)
Now (1.5) (1.5 + 0.8 = 2.3) (2.3 + 0.8 = 3.1) (3.1 + 0.8 = 3.9) (3.9 + 0.8 = 4.7)
a = 4.7
ND-21-5-2023
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