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GATE Aptitude

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$8\\ 8\times1-2=6\\ 6 \times2-3=9\\ 9 \times 3 - 4=23\\ 23 \times 4-5=87\\ 87 \times 5-6=429$

Hence, Option(D)429 is the correct choice.

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8*1-2=6

6*2-3=9

9*3-4=23

23*4-5=87

87*5-6=429

option d is correct
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