Quantitative Aptitude - Arithmetic Ability Questions

If p and q are the roots of the equation x2 –15x + r = 0 and p –q = 1, then what is the value of r ?

The zeros of the cubic polynomial 2x3-x2-2x+1 are a, b and c respectively. Find a+b+c :

A fraction is greater than twice its reciprocal by 7/15. What is the fraction?

The average marks of 40 students in an examination was 34. It was later found that the marks of one student had been wrongly entered as 62 instead of 26. what is the correct average?

P and Q can do a project in 150 and 100 days respectively. In how many days can they complete 60% of the project if they work together?

Rithika had Rs 8000. She invested some of it in savings scheme P and the rest of the money in savings scheme Q. She invested for 3 years in savings scheme P and for 2 years in savings scheme Q. savings scheme P offers SI at a rate of 20% pa while savings scheme Q compounded annually at the rate of 30% pa. The interest received from savings scheme P is 930 more than the interest received from savings scheme Q. If Rs 1500 is debited from the invested amount of savings scheme P then find the difference between the amount invested by Rithika in savings scheme P & savings scheme Q.

Find out the odd word/letters/number/number pair from the given alternatives.

If Tan θ = 9/40, then Sec θ = ?