Question
If a tank can be filled by a tap in 20 hours, but due to
an outlet, it actually takes 8 hours longer to fill the tank, find the duration in which the outlet alone would empty the tank?Solution
Let tap βAβ fill the tank and tap βBβ empty the tank. Taking LCM of 20 and 28 = 140 Efficiency of A = 7 Efficiency of (A β B) = 5 Efficiency of B = 7 β 5 = 2 Tap B will empty the tank = 140/2 = 70 So, tap B will empty the tank in 70 hours.
In the following expression find the missing term:
Select the number from among the given options that can replace the question mark (?) in the following table.
A series is given with one term missing. Choose the correct alternatives from the given ones that will complete the series.
18, 19, 27, 36, ___, 225
Find the missing letter.
Select the combination of numbers that when placed sequentially in the blanks of the given series will complete the series.
3 _ 3 _ 5 3 3 5 _ 3 3...
In the following expression find the missing term:Β Β
- Study the given pattern carefully and select the number that can replace the question mark [?] in it.
First row: 10, 6, 964
Second row: 7, 3... What will come in place of question mark [?] following the same pattern as given below?
Study the given pattern carefully and select the number that can replace the question mark (?) in it.