Quantitative Aptitude - Arithmetic Ability Questions

In the following question, select the odd word pair from the given alternatives

What is the value of √2 Sec 45° + (1/√3)Tan 30°?

In a test, Charan secured 54 marks that was also equivalent to obtaining 72% marks. How many marks was the test out of?

If x=2+3,then the value of x2-x+1x2+x+1 is

A and B have their annual average income Rs. 80,000.
B and C have their annual average income Rs. 75,000.
C and A have their annual average income Rs. 78,000.

The annual income of A is ?

The solution set of 4x - 3y = 47 and 3x + y = 32 is

What is the value of ( 1/3 + cosec30)?

A's salary was decreased by 50% and subsequently increased by 50%. How much percent does he lose?