Question
Five years from now, K and M together will be 80 years
old. If their present ages are in the ratio 4:3, find the difference in their ages.Solution
Let the present ages of K and M be 4x and 3x years.
Sum of the present ages = 80 − 10 = 70 years
ATQ,
(4x + 3x) = 70
7x = 70
So, x = 10
So, difference between their present ages = (4x − 3x) = x = 10 years
6Â Â Â Â Â Â Â Â Â Â 5Â Â Â Â Â Â Â Â Â Â 40Â Â Â Â Â Â Â Â Â Â Â 32Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 249Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 240
There are three series given below which are following with the same pattern.
Series I: 9, 10, 32, 163, 1145
Series II: 4, B, C, D, E
...31Â Â Â 32Â Â Â Â 41Â Â Â Â 66Â Â Â 115Â Â Â Â ?
20, 36, 103, 406, ?, 12130
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 ...
14, 28, 54, 98, 154, 224
5 14 56 220 1125 6786
...If  2,  7, 20,  x ,  110,  235,
Then,  7 x + 7√x = ?
Find the wrong number in the given series.
12, 18, 27, 42, 62, 87
34Â Â Â 35Â Â Â Â 44Â Â Â Â 69Â Â Â 118Â Â Â ?
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