Quantitative Aptitude - Arithmetic Ability Questions

In the following question, select the odd word from the given alternatives.

Coefficient of x2 in (x + 7)(5 - 3x)(3x - 6) is

3cosA is equal to

Triangle DEF is right angled at E. If cot D = 5/12, then what is the value of sin F?

The length of one side and the diagonal of a rectangle are 7 cm and 25 cm respectively. Find its area (in cm²)

The vertical angle A of an isosceles triangle ΔABC is three times the angle B of it. The measure of the angle A is

The sum of squares of three positive integers is 323. If the sum of squares of two numbers is twice the third, their product is

ΔABC is similar to ΔPQR. Length of AB is 18 cm and length of the corresponding side PQ is 12 cm. If area of ΔABC is 324 sq cm, what is the area of ΔPQR?