Question
8 9 22 75 316
? Directions (141-145): What should come in place of the question mark (?) in the following number series?Solution
8 × 1 + 12 = 9 9 × 2 + 22 = 18+4 = 22 22 × 3 + 32 = 66+9 = 75 75 × 4 + 42 = 300+16 = 316 316 × 5 + 52 = 1580+25 = 1605
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