Question
The difference between the value of the number increased
by 20% and the value of the number decreased by 30% is 120. Find the number.Solution
Let the number be x According to the question x × (120/100) - x × (70/100) = 120 120x - 70x = 12000 50x = 12000 x = 240
More No. System Questions
{(12√5 + 6√5 )} ×{(10√5 - 5√5 )} - 8² + 6² = ?
3    8    26    93    ?   1985   11940
...What will come in place of the question mark (?) in the following series?
75, 219, 388, ?, 809, 1065In each of the following number series, one term is missing. Find the missing term.
7, 14, 28, 56, 112, ?
What will come in place of the question mark (?) in the following series?
15, 90, 450, ?, 5400, 10800Â
- What will come in place of (?), in the given number series.
1, 1, 2, 3, 5, ?, 13 2, 6, ?, 20, 30, 42
612, 487,?, 396, 388, 387
7 12 33 ? 635 3804
...28, 43, 73, 118, ?, 253
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