Question
20 men working 6 hours a day can paint a building in 25
days. If 30 men work 8 hours a day, how many days will it take to paint the building?Solution
ATQ,
Let the efficiency of a man = 'x' units/hour
Total work = 20 × x × 6 × 25 = 3000x units
Number of days taken by 30 men working 8 hours/day =
= 3000x ÷ (30 × x × 8)
= 3000x ÷ 240x = 12.5 days
169, 224, 293, 385, 497, 629
Find the wrong number in the given number series.
20, 33, 50, 69, 93, 121
25Â Â Â 26Â Â Â Â 28Â Â Â Â 32Â Â Â Â 42Â Â Â Â 56
Find the wrong number in the given number series.
8, 12, 23, 40, 66, 103
8137, 5405, 3669, 2701, 2201, 1997
Find the wrong number in the given number series.
78, 66, 51, 39, 20, 12
2824Â Â Â Â 2314Â Â Â Â Â 1973Â Â Â Â 1759Â Â Â Â 1634Â Â Â Â 1574
In each of the following number series, one term is wrong. Find the wrong term.
3, 7, 13, 21, 31, 42, 57
Find the wrong term in the given series below.
2847, 2954, 2799, 3088, 2727, 3256
Find the wrong number in the given number series.
2, 5, 10, 17, 26, 38, 50
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