Quantitative Aptitude - Arithmetic Ability Questions

If 1-aa3+9 = 19 - a1-a3, then what is the value of a?

In ∆ABCif the median AD=1/2 BC, then ∠BAC is

Of the 5 numbers whose average is 76, the first is 3/7 times the sum of other 4. The first number is

Find measure of central angle of the arc whose length is 22 cm and radius of the circle is 28 cm?

An article was sold at Rs. 950 allowing 5% discount on the marked price. The marked price of the article is

What is the simplified value of cosec 2A + cot 2A?

If x - y = 6 and xy = 40, then find x2 + y2 ?

What number should be added to each of the numbers 94, 24, 100 and 26, so that the resulting numbers are in continued proportion?