Question
The average age of 26 smdents in a class is 15 years. If
teacher's age is included in it, then the average will increase by one. What is the teacher's age (in years)?Solution
ATQ,
Total age of 26 students = 15×26=390 Total age with teacher = 16×27=432 Teacher's age = 432−390=42 Final Answer: The teacher is 42 years old.Â
8      24       48      144      ?     864
...16, 54, 128, ‘?’, 432,686
25, 200, 40, ?, 64, 512
2120 1976 2097 1997 ? 2014
...32Â Â Â 96Â Â Â Â 240Â Â Â Â 480Â Â Â Â Â 720Â Â Â ?
10 59 ? 1169 3503 7001
...5Â Â Â Â Â Â Â Â Â 18Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 44Â Â Â Â Â Â Â Â Â Â Â 83Â Â Â Â Â Â Â Â Â 135Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 200Â Â Â Â ...
Select the number from among the given options that can replace the question mark (?) in the following series.
8, 27, 64, 125, 216, ?
75    196    52    221    ?    250
28 34 63 ? 769 3847
...
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