Question
A and B can complete a job together in 30 days; B and C
can complete the same job together in 25 days, while C and A can complete the same job together in 10 days. In how many days will A, B, and C be able to complete the same job alongside D, who is only 75% as efficient as C?Solution
A+B= 30 B+C=25 C+A=10days LCM of 30, 25, and 10 = 150 A+B    B+C     C+A 30       25       10           150  5         6       15 Total 2(A+B+C) = 5+6+15+=26 A+B+C =13 C = 13-5 =8 D= 8×75/100 =6 NOW A+B+C+D = 13+6=19 SO total days = 150/19 =7(17/19) days
100, 164, 740, 3044, 9444, 20320
In each of the following questions, one number in the series does not follow the pattern of the others. Identify that wrong number in the series.
18, 27, 38, 56, 66, 83
Find the wrong number in the given number series.
1600, 800, 1200, 400, 100 , 12.5
In each of the following number series, one term is wrong. Find the WRONG term.
5, 10, 19, 33, 49, 70
The following numbers form a series. Find the odd one out.
24, 36, 54, 78, 121.5, 182.25
Find the wrong number in the given number series.
204, 215, 277, 337, 416, 518164, 304, 433, 551, 658, 752
9256Â Â 6844Â Â Â 4888Â Â 3350Â Â 2152Â Â 1276
273, 204, 138, 84, 39, 3
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