In the following question find the missing number?

Which set of letters when sequentially placed at the gaps in the given letter series shall complete it?
_qr_srq_p_rs_r_p

What is value placed at Question mark?
10.1: 1.01 ::  0.1: ?

In a row of students, Mohan is 10th from right. Sohan is 25th from left. When they change their position then Mohan becomes 22 from right. What is the new position of Sohan from left?

In the following questions complete the number series :
204, 100, 48, 22, ___

Mohan travelled 5 km towards the West. Then he travelled 3 km. after turning to the left, then 9 km. after turning to the right. Then he went 3 km. towards the North. How far is he from the starting point?

Six boys are sitting around a circular table facing the centre. M is sitting second to the right of K who is sitting opposite to F. L and O are sitting opposite each other. Neither L nor R sits near F. Who sits in front of R?

Some equations are solved on the basis of a certain system. Find the correct answer for the unsolved equation on that basis.
7– 4 – 1 = 714, 9 – 2 – 3 = 932 8– 0–4 = ?