Question
A work can be completed by ‘A’ and ‘B’, alone in
15 days and 20 days, respectively. Find the number of days taken by ‘C’ to complete the same work alone if ‘A’, ‘B’ and ‘C’ together can complete the whole work in 4 days.Solution
Let total work = 60 units (LCM of 15 and 20) Efficiency of ‘A’ = (60/15) = 4 units/day Efficiency of ‘B’ = (60/20) = 3 units/day Combined efficiency of ‘A’, ‘B’ and ‘C’ = (60/4) = 15 units/day Efficiency of ‘C’ = 15 – (4 + 3) = 8 units/day Required time taken = (60/8) = 7.5 days
Select the set of letters that when sequentially placed in the blanks of the given letter series will complete the series.
_ x y _ w _ y z w x _ _ w _ _ z
Drake : Duck : : Wizard : ?Â
If 23 @ 18 = 9 and 29 @ 24 = 21', then 24 @ 19 = ?'. What will come in place of question mark?
Seven friends, A, B, C, D, E, F and G are sitting in a straight line facing the same direction. E is sitting at one extreme end. E is sitting second to ...
Choose the word which is different from the rest
Four letter-clusters have been given, out of which three are alike in some manner and one is different. Select the letter-cluster that is different.
- Select the word-pair in which the two words are related in the same way as are the two words in the following word-pair:
Sparrow : Bird Number of letters skipped in between adjacent letters goes on increasing successively by one in the series. Identify the set following the above rule.
Select the number -pair from the given options that shares a similar relationship as the given number-pair.
192-108
‘Confined spaces’ is related to ‘Claustrophobia’ in the same way as ‘Insects’ is related to ‘______’.
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