Number System
What value should come in place of ? in the given number series ? 15, 51, 162, 498, 1509, ?

3434
5656
7878
4545

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Number System
The sum of five consecutive odd numbers of set p is 435. What is the sum of five consecutive numbers of another set q. Whose largest number is 45 more than the largest number of set p?

670
730
770
530

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Number System
Find the greatest number which divides 83, 125 and 209 leaving the same remainder in each case.

17
42
23
19

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