How many numbers lie between 300 and 500 in which 4 comes only one time? [UPSC 2009(CS-P)]

In a meeting, the map of a village was placed in such a manner that south – east becomes north, north – east becomes west and so on. What will south become? [UPSC 2010 (CS-P)]

In a tournament 14 teams play league matches. If each team plays against every other team once only then how many matches are played? [UPSC 2010 (CS-P)]

In an examination, there are three subjects A, B and C. A student has to pass in each subject. 20% students failed in A, 22% students failed in B and 16% failed in C. The total number of students passing the whole examination lies between  [UPSC 2009(CS-P)]

In how many ways can four children be made to stand in a line such that two of them, A and B are always together? [UPSC 2010 (CS-P)]

P, Q, R and S are four men. P is the oldest but not the poorest. R is the richest but not the oldest. Q is older than S but not than P or R. P is richer than Q but not than S. The four men can be ordered (descending) in respect of age and richness, respectively, as: [UPSC 2010 (CS-P)]

Running at a speed of 60 km per hour, a train passed through a 1.5 km long tunnel in two minutes. What is the length of the train? [UPSC 2010 (CS-P)]

Six books, A, B, C, D, E and F are placed side by side. B, C and E have blue cover and the other books have red cover. Only D and F are new books and the rest are old. A, C and D are law reports and other are Gazetteers. What book is a new law report with a red colour?
Which of the statements given above is/are correct? [UPSC 2010 (CS-P)]

Six persons A, B, C, D, E and F are standing in a row. C and D are standing close to each other alongside E. B is standing beside A only. A is fourth from F. Who are standing on the extremes? [UPSC 2009 (CS-P)]

Six persons M, N, O, P, Q and R are sitting in two rows, three in each. Q is not at the end of any row. P is second to the left of R. O is the neighbour of Q and is sitting diagonally opposite to P. N is the neighbour of R. On the basis of above information, who is facing N? [UPSC 2010 (CS-P)]