Quantitative Aptitude - Arithmetic Ability Questions

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

If the radius of the cylinder is decreased by 20%, then by how much percent the height must be increased, so that the volume of the cylinder remains same?

The total surface area of a hemisphere is 462 sq.cm. Find its diameter (in cm).

Average age of 5 students of a school is 14 years. The average age of students and their Mathematics and science teachers is 30 years. If the age of science teacher is 6 years more than the age of Mathematics teacher, then what is the age (in years) of Mathematics teacher?

If (a+1a)2=3,then the value of a6-1a6 will be

32% of a number exceeds 17% of the same number by 120. What is the value of the number?

If ABCD is a trapezium, AC and BD are the diagonals intersecting each other at point O. Then AC : BD is

What will be the value of a3+b3, if a2+b2=32 and a+b=8 ?