Question
Average of 20 numbers is 90. Average of first 8 numbers
is 125 while average of last nine numbers is 40. If ninth number is 25% less than the tenth number which is equal to the eleventh numbers then find the tenth number.Solution
Sum of ninth, tenth and eleventh number = 20 × 90 – 8 × 125 – 9 × 40 = 440 Let tenth number = x = eleventh number So, ninth number = 0.75 × x = 0.75x So, x + 0.75x + x = 440 Or, 2.75x = 440 Or, x = 160
In a certain code language, 'CHILD' is written as ‘6169248' and 'GUEST' is written as '142153840'. How will 'BOOK' be written in that language?
Find the missing term from the given alternatives:
B: 16 :: D : ?
Select the Venn diagram that best represents the relationship between the following classes.
Blue, Water, Star
Select the Venn diagram that best illustrates the relationship between the following classes.
Electrical Appliance, Refrigerator, Freezer
...
Identify the figure given in the options which when put in place of ‘?’ will logically complete the series.
‘Track’ is related to ‘Athlete’ in the same way as ‘Classroom’ is related to ‘______’.
Select the correct option that indicates the arrangement of the following words in a logical and meaningful order.
1. Lung
2. Kidney
<...During lunch break, eight colleagues, namely A, B, C, D, E, F, G and H are sitting in a circle facing the centre at equal distances. B is an immediate n...
Which number will replace the question mark (?) in the following number series?
5, 4, 6, 15, 56, ?
In each of the given number-clusters, the number on the right side of = (the equal to sign) is calculated by performing certain mathematical operations ...
Relevant for Exams:
