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?

530
730
770
670

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Number System
There are seven boys and four girls in a row. In how many ways can they be seated in the row so that all the girls do not sit together ?

11! - 8! x 3!
11! - 8! x 4!
10! - 7! x 3!
11! - 7! x 4!

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