Quantitative Aptitude - Arithmetic Ability Questions

What is the value of sin(11π/6)?

If cosA = x, then x is

The marked price of an article is Rs 2400. It is sold at two successive discounts of 10% and 15%. What is the selling price (in Rs) of the article?

The measure of the four successive angles of a quadrilateral are in the ratio 7 : 11 : 7 : 11. The quadrilateral is a ______.

What is the average of 36, 43, 51, 68, and 77?

The sum of a non-zero number and ten times its reciprocal is 7. Find the number.

P does half as much work as Q in 1/3 of the time. If together they take 15 days to complete a work, how many days will P take to do it alone?

Choose the odd word/letters/number/number pair from the given alternatives.