Question
84 is divided into two parts in such a way that the
fourth part of the first part and the fifth part of the second are in the ratio 1 : 2. The first part is approximately what percent of the second part?Solution
First part = x and second part = 84 – x => (x/4)/[(84-x)/5] = 1/2 ⇒ x/4 × 5/(84-x) = 1/2 ⇒ 10x = 336 - 4x ⇒ 14x = 336 ⇒ x = 24 Second part will be 84 – 24 = 60 Required percentage = (24/60) × 100 = 40%
What will come in place of the question mark (?) in the following series?
4, 2605, 5309, 8118, ?
117, 117, 121, 129, 141, ?
- What will come in place of the question mark (?) in the following series?
32, 45, ?, 137, 216, 317 10296/72 + 3040 = (? × 4) + 1395
38, 41, 50, ?, 158, 401Â
18, 35, 68, 117, ?, 263Â
What will come in place of the question mark (?) in the following series?
10, 135, ?, 226, 234, 235
- 741, 852, 1074, 1407, ?
9    14    38    129    ?   2705   16260
...What will come in place of the question mark (?) in the following number series?
21, 42, 67, 96, ?, 166