Quantitative Aptitude - Arithmetic Ability Questions

If a - b = -6 and a2 + b2 = 44, then ab is

If the value 5 = 2.236,then calculate the value of 405 - 1280-125

If a + b = 10 and ab = 21, then the value of (a - b)2 is

The difference between the compound interest compounding half yearly for 1 year and the simple interest for 1 year on a certain sum of money lent out at 8% per annum is Rs 64. What is the sum (in Rs)?

The ratio of spirit and water in the two vessels is 5 : 1 and 3 : 7 respectively. In what ratio the liquid of both the vessels should be mixed such that a new mixture containing half spirit and half water is obtained?

Assuming that the numbers in each of the following figures follow a similar pattern, select the option that can replace the question mark (?) in figure C.

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

Calculate the angle subtended by the chord at the point on the major arc if the radius and the chord of the circle are equal in length.