Quantitative aptitude
624, 570, 530, 502, ?, 474

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

Find out the missing number in the following number series. 1) 19, 34, 39, 44, ?, 30 A.49 B.52 C.22 D.35 E.28 Sol: 19 * 1 = 19 17 * 2 = 34 13 * 3 = 39 11 * 4 = 44 7 * 5 = 35 5 * 6 = 30

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1, 2, 7, ?, 111, 564

Find out the missing number in the following number series. 1) 1, 2, 7, ?, 111, 564 A.28 B.26 C.14 D.21 E.18 Sol: 1 * 1 + 1 = 2 26 * 4 + 7 = 111 111 * 5 + 9 = 564 2 * 2 + 3 = 7 7 * 3 + 5 = 26

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An alloy of copper and zinc contains……….% copper by weight. ‘X’ kg of zinc is added to the mixture which makes zinc 33 1/3% by weight

Q. An alloy of copper and zinc contains……….% copper by weight. ‘X’ kg of zinc is added to the mixture which makes zinc 33 1/3% by weight. If ‘X’ Kg of copper would have been added instead, the percentage of Cu by weight would be 83 1/3%. If 3X Kgs zinc would have been added, the percentage of zinc ...

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