Quantitative Aptitude - Arithmetic Ability Questions

The measures of the four angles of a quadrilateral are in the ratio 1:2:3:4. What is the measure of the biggest angle?

3 numbers whose average is 112, the first number is 1/6th the sum of other 2. What is the first number?

If 2x2+2y2=4a the find the value of 2ax2-a+2ay2-a

A root of equation ax2 + bx + c = 0 (where a, b and c are rational numbers) is 5 + 3√3. What is the value of (a2 + b2 + c2)/(a + b + c)?

A dealer is selling an article at a discount of 5% on the Marked price. If the Marked price is 12% above the cost price and the article was sold for Rs. 532 then the cost price is (in Rs.)

Some one rupee, 50 paisa and 25 paisa coins make up rupees 93.75 and their numbers are in the proportion of 3 : 4 : 5. Find the number of each type of coins?

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

If a + b = 4 and ab = -5, then what is the value of a3 + b3?