Question
The average of fifty numbers is 55 while the average of
first twenty-five numbers and last twenty-five numbers is 60 and 70, respectively. Find the twenty-fifth term.Solution
ATQ,
Sum of fifty numbers = (50 × 55) = 2750
Sum of the first twenty-five numbers = (25 × 60) = 1500
Sum of the last twenty-five numbers = (25 × 70) = 1750
So, twenty-fifth term = 1500 + 1750 - 2750 = 500
There is a wrong term in the series I named 'P' and the right term which should come at the place of the wrong term is 'Q'. Find the fifth term of seri...
2, 12, 90, 240, ?, 1260
6 16 ? 244 1,245 7,506 52,591
2Â Â Â Â Â Â Â Â Â Â Â Â Â Â 3.5Â Â Â Â Â Â Â Â Â Â 11.5Â Â Â Â Â Â Â Â 44Â Â Â Â Â Â Â Â Â Â Â 192.5Â Â Â Â Â 988
9Â Â Â Â Â Â Â Â Â a...
D irection: Which of the following will replace ‘?’ in the following series
300, 300, 301, 303, ‘?’, 324, 364
...7 29 ? 129 211 349
25Â Â Â Â Â Â Â Â Â Â 34Â Â Â Â Â Â Â Â Â Â 61Â Â Â Â Â Â Â Â Â Â 106Â Â Â Â Â Â Â Â 169Â Â Â Â Â Â Â Â ?
...147      138       120      93      ?      12
...10, 22, 46, ?, 130, 190
12, 24, 72, 288, 1440, ?
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