Find the missing number?

If 6 @ 4 @ 7 = 101 and 2 @ 5 @ 11 = 150, then what is the value of A in A @ 8 @ 9 = 289?

Directions: In each question below are two/three statements followed by two conclusions numbered I and II. You have to take the given statements to be true even if they seem to be at variance from commonly known facts and then decide which of the given conclusions logically follow (s) from the statements disregarding commonly known facts.
Statements:
Some pencils are erasers.
All pencils are sharpeners.
All erasers are not sharpeners.
Conclusions:
I. All erasers can be pencils.
II. Some sharpeners are erasers.
Give answer
(A) if only conclusion I follows.
(B) if only conclusion II follows.
(C) if either conclusion I or conclusion II follows.
(D) if neither conclusion I nor conclusion II follows.
(E) if both conclusion I and conclusion II follows.

212 : 436 : 560 : ?

Directions : In each of the questions below are given four statements followed by three conclusions numbered I, II, and III. You have to take the given statements to be true even if they seem to be at variance from commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.

Statements:

No grass is flower.

All flower are trees.

Conclusions:

I. Some trees are flowers.

II. Some trees are grasses.

III. No tree is a grass.

Kumar said, 'This girl is the wife of my mother's grandson' What relationship does the girl have with Kumar?

In the following question, select the related letter/letters from the given alternatives.
PAL : RDP : : MRF  :  ?

Study the given information carefully and answer the given questions.
Auditions for a show were held in seven different cities of India- Chennai, Bengaluru, Cochin, Mumbai, Delhi, Bhopal and Kolkata, not necessarily in the same order, during the first seven months of the year 2011 (starting on January and ending in July). The auditions were held only in one city during a month. Auditions in only four cities were held between the Kolkata audition and the Cochin audition. The Kolkata Audition was not held in June. Only one audition was held between the Kolkata audition and the Bengaluru audition The Chennai audition was held immediately after the Kolkata audition. The Delhi audition was held immediately before the Bhopal audition. The Bhopal audition was not held in May.
During March, the audition was held in which of the following cities?