Question
Roshan and Rahul received marks in their quarterly exam
in a ratio of 9:8. Additionally, the ratio of marks Roshan obtained in the quarterly exam to the marks he obtained in the half-yearly exam is 2:3. For Rahul, this ratio between the quarterly and half-yearly exams is 4:5. If the combined total of marks Roshan and Rahul earned in the half-yearly exam is 1410, determine the number of marks Rahul secured in the half-yearly exam.Solution
Let, marks obtained by Roshan and Rahul in quarterly exam be 9x and 8x, respectively. According to question, (9x) × (3/2) + (8x) × (5/4) = 1410 13.5x + 10x = 1410 23.5x = 1410 x = 1410/23.5 x = 60 So, marks obtained by Rahul in half-yearly exam = (8x) × (5/4) = 10 × 60 = 600
156, 172, 196, ?, 268, 316
- What will come in place of the question mark (?) in the following series?
1, 2, 5, 16, 65, ? What value should come in the place of (?) in the following number series?
15, 16, 24, 51, 115, ?
Find the missing number in the given number series.
6, 15, 35, 66, 108, ?8      27       64      125     ?       343Â
...- What will come in place of (?) in the given number series.
5, 10, 8, 16, 11, ?, 17 What will come in place of the question mark (?) in the following series?
520, 519, 511, ?, 420, 295
7, 9, 21, ?, 107, 197
100 180 294 448 648 ?
312, 302, 282, ?, 212, 162