Question
The sum of two numbers is 90 whereas the sum of their
reciprocals is (30/11). Find the square of the product of the two numbers.Solution
ATQ,
Let the two numbers be 'x' and 'y'.
So, x + y = 90
And (1/x) + (1/y) = (30/11)
Or, {(x + y)/(xy)} = (30/11)
Or, xy = (11/30) × 90 = 33
So, required square = 33² = 1089
More No. System Questions
25   25   37.5   ?   328.125   1804.6875
18, 35, 68, 117, ?, 263Â
Find the missing number, in the given number series.
42, 52, 72, 112, 192, ?
Find the missing character.
Find the missing number in the given number series.
512, 128, 32, 8, ?, 116Â Â Â 25Â Â Â 36Â Â Â 49Â Â Â 64Â Â Â Â ?
7 47 ? 223 359 527
...What will come in the place of questions (?) mark in the following questions.
1279, 1265, ? , 1225, 1193, 1149
30, 43, 58, 75, 94, ?
What will come in place of the question mark (?) in the following series?
81, 83, 87, 95, 111, ?
