Question
There are 15 numbers such that average of first 12
numbers is 30 while the average of last five numbers is 50. Find the 12th number, if the ratio between 11th and 12th number is 6:5, respectively.Solution
Sum of first 12 numbers = (12 x 30) = 360 Sum of last 5 numbers = (50 x 5) = 250 Sum of 11th and 12th number = (360 - 250) = 110 So, 12th number = 110 x (5/11) = 50
In the following number series only one number is wrong. Find out the wrong number.
18, 119, 708, 3534, 14136, 42405
In a certain code language, 'PQRS' is written as "HIJK'. How will 'XYZA' be written as in the same coding language?
Statements:
I. Some Mirrors are not Glasses.
II. All Glasses are Strong.
III. Some Strong are Fragile.
Conclusions:
...Which of the following groups of letters when sequentially placed from left to right will complete the given series?
aaaa_ bbbbbaaaa_ bbbbb_ ...
A paper is folded and cut as shown below. How will it appear when unfolded?
A paper is folded and cut as shown below. How will it appear when unfolded ?
Five girls P, Q, R, S and T sit around a circular table facing towards the centre (not necessarily in the same order). Only one girl sits between S and ...
Complete the missing portion of the given pattern by selecting from the given options.
The sequence of folding a piece of paper and the manner in which the folded paper is cut is shown in the following figures. How would this paper look wh...
Select the option that is related to the fifth letter-cluster in the same way as the second letter-cluster is related to the first letter-cluster and th...