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how to improve reading skills

24:60::120:?

in an infinite geometric progression the first term is A and the infinite sum is 5 then A belongs to ?
1.A < -10
2.0 < A < 10
3.0 < A < or =10
4.None of these

There are 250 integers a1 , a2, ..........a250, not all of them are necessarily different.let the greatest integer of these 250 integers be referred to as maximum and the smallest integer be referred to as Minimum.The integers a1 through a124 form sequence A and the rest form sequence B.Each member of A is less than or equal to each member of B.if all values in A are changed in sign , while those in B remains unchanged.which of the following statement is true?
1.Every member of A is greater than or equal to every member of B
2.Maximum is in A
3.if all the numbers originally in A and B had the same sign, then after the change of sign, the largest number of A and B is in A
4.None of these.

( Explain in detail )

7 9 17 8 10 21
30 50 ?
4 5 6 3 3 6

7 9 17 8 10 21
30 50 ?
4 5 6 3 3 6

the youngster has proven his ability as an aggressive sportsperson and age being on his sides, he has a huge chance of succeeding  in the near future 

please tell the error in the sentence

The most powerful advantage of internet is thatit decentralizes works centres and makes widespread empowerment

if a clock strikes once at 12 A.M. , twice at 1 A.M. , thrice at 2 A.M. and so on.How many times will the clock be struck in the course of 3 days? 1. 756. 2. 828. 3. 678. 4.1288

What are the chances of me getting into a B-School immediately after graduation (I mean no work experience)?(I am academically doing good)