IBPS Government Jobs Exams Numerical Ability Pipes and Cistern

Two pipes A and B together can fill a cistern in 4⅘ hours. Had they been opened separately, then B would have taken 4 hours more than A to fill the cistern. How many time will be taken by A to fill the cistern separately?
A)6 hours B)5 hours C)8 hours D)7½ hours E)None of these

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IBPS Other Question

In the following number series only one number is wrong. Find out the wrong number.
850, 600, 550, 500, 475, 462.5, 456.25
A)600 B)550 C)500 D)462.5 E)475 The percentage of metals in a mine of lead ore is 60%. Now the percentage of silver is 3/4% of metals and the rest is lead. If the mass of ore extracted from the mine is 8000 kg, the mass (in kg) of lead is:
A)4763 B)4764 C)4762 D)4761 E)4264