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Total students = 1000 Let, students appear in exam Z only = a Total students appeared in exam Y = 360 Ratio of number of students appeared in exam X and Y only to students appeared in exam Y and Z only = 2:3 Students appeared in exam X and Z both = a/2 Number of students appeared in all three exams = (4/100) × 1000 = 40 Number of students appeared in Y exam only = No. of students appeared in Y and Z only = 3x Number of students appeared in exam X and Y only = (2/3) × 3x = 2x Now, 2x + 3x + 3x + 40 = 360 ⇒ x = 40 And, 12.5x + a + a/2 + a = 1000 => 5a/2 = 500 ⇒ a = 200 Students appeared in at least two exams = 80 + 120 + 100 + 40 = 340
124, 180, 108, 198, ?, 220
1236, 1445, 1675, 1933, 2226, ?
78, 80, 84, ?, 108, 140
4, 4, 12, 60, ?, 3780
What will come in place of (?) question mark in the given number series.
960, 960, 480, ?, 40, 8
86, 127, ?, 209, 250, 291
244, 179, 129, 92, 66, ?
?, 32, 75, 144, 245, 384
81 72 136 111 ? 278
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