Quantitative Aptitude - Arithmetic Ability Questions

Iftan 450=cot∅, then the value of ∅, in radians is 

The greatest perfect square number of 6 digits is

There are two numbers such that the first number is half of the second number. If their average is 57, then what is the first number?

The addition of a rational number and its reciprocal is 61/30. Calculate the number.

In a week, how many times are the hands of a clock at right angles with each other?

Select the odd letters from the given alternatives.

Rohit buys a ball for Rs 450 and sells it. Rohit gives two successive discount of 20% and 5% to the customer. What will be the selling price (in Rs) of the ball?

What is the value of cos2A/(1 + sinA)?