Question
Average 20 numbers is ‘x’. If the average of
first 12 numbers is 62.5 while average of last 5 numbers is 84.8 and 13th, 14th and 15th numbers are (3x - 49), (x + 52) and 183 respectively. Find the 14th number.Solution
According to question, => 20x = 62.5 × 12 + 84.8 × 5 + 3x – 49 + x + 52 + 183 => 16x = 1360 => x = 85 Therefore, 14th number = 85 + 52 = 137
What will be the next number in the series?
2,5,11,23,47,?
4Â Â Â Â Â Â Â Â Â Â Â Â Â Â 7Â Â Â Â Â Â Â Â Â Â Â Â Â Â 24Â Â Â Â Â Â Â Â Â Â Â 91Â Â Â Â Â Â Â Â Â Â Â 462Â Â Â Â Â Â Â Â Â 2763
18Â Â Â ...
7, 8, 12, 21, 37, ?
124    174    211    ?     254    264
...2, 9, 19, 32, 48, 67, ?
In each of the following questions the number series is given. One term of the series is denoted by x. You have to calculate of value of x and by using ...
(32.03 + 111.98) ÷ 18.211 = 89.9 – 20.23% of ?
(45)2 ÷ ∛729 + (35)2 ÷ 1.4 =?
24 ? 14 16 39 88.5
...123   125   129   132   ?   145
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