Find out the missing number in the following number series.
Q. 624, 570, 530, 502, ?, 474
A.474
B.478
C.484
D.492
E.496
Sol:
624 – 82 + 10 = 570
570 – 72 + 09 = 530
530 – 62 + 8 = 502
502 – 52 + 7 = 484
484 – 42 + 6 = 474
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19, 34, 39, 44, ?, 30
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