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

_r_r_t_r_r_t

If "A" denotes "added to", "B" denotes "divided by", "C" denotes "multiplied by" and "D" denotes "subtracted from", then 116 B 29 C 6 A 24 D 45 = ?

In a certain code language, "REMINDER" is written as "SFNJMCDQ". How is "STANDARD" written in that code language?

If the angle of elevation of the top of a pillar from the ground level is raised from 30° to 60°, the length of the shadow of a pillar of height 503 will be decreased by

Arrange the given words in the sequence in which they occur in the dictionary.

i. Obstacle
ii. Obscure
iii. Obsession
iv. Obstruct

If 27th December 2009 was a Thursday, then what day of the week was it on 1st March 2010?

The difference between the compound interest and the simple interest on Rs. 6250 at 8% per annum in 2 years is

In the following question, two statements are given each followed by two conclusions I and II. You have to consider the statements to be true even if they seem to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follows from the given statements.

Statements:
(I) Some notes are coins.
(II) No coin is a card.

Conclusion:
(I) All cards can be notes.
(II) Some notes are neither coins nor cards.