Algebra-2 (Sets) (GATE-2010)

25 persons are in a room. 15 of them play hockey,17 of them play football and 10 of them play both hockey and football.Then the number of persons playing neither hockey nor football is:

(A) 2

(B) 17

(C) 13

(D) 3
Solution follows here:

Puzzle-7 (APPSC-2011)

How many letters of the English alphabet (Capitals)appear same when looked at in a mirror:

(A) 9

(B) 10

(C) 11

(D)12
Solution follows here:

Progressions - 2 (IIFT-2008)

The interior angles of a polygon are in A.P. If the smallest angle is 120⁰ and common difference is 5⁰, then the number of sides in the polygon is:

(A) 7    (B) 8    (C) 9    (D)None of the above

Solution follows here:

Progressions - 1 (IIFT-2008)

If the positive real numbers a, b and c are in Arithmetic Progression, such that abc = 4, then minimum possible value of b is:

(A)  2^3/2

(B)   2^2/3

(C)   2^1/3

(D)None of the above
Solution follows here: