Question
Two students appeared in an exam and one secured 12
marks more than the other. If marks of student who got more marks is 55% of the sum of the marks of both of them, then find the marks obtained by them.Solution
Let total marks obtained by both of them is x and y respectively. x – y = 12 And, x = 0.55 × (x + y) x = 0.55 × (12 + y + y) x = 0.55 × (12 + 2y) x = 6.6 + 1.1y 12 + y = 6.6 + 1.1y 0.1y = 5.4 y = 54 x = 54 + 12 = 66
What will come in place of the question mark (?) in the following series?
4000, ?, 320, 192, 153.6, 153.6
5   3   4   7.5   17    ?    138
24  12  18  ?  157.5  708.75  3,898.125
Find the missing number in the given number series.
98, 89, 114, 50, 194, ?
- What will come in place of the question mark (?) in the following series?
-5, -2, ?, 10, 19, 30 188    178    158   ?     88    38
1290, 1225, 1175, ?, 1112, 1095, 1085
Find the missing number in the given number series.
2, 7, 19, 62, ?, 1270Â
64, 80, 120, 210, ?, 945
216, 81, 297, 378, ?, 1035, 1728
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