Quantitative Aptitude - Arithmetic Ability Questions

72% of a number is 90. What is the number?

If A : B = 3 : 5, then what is the value of A + B : B?

Factorise x2 + 3x -­ 18

ABC is an equilateral triangle of side 6 cm. If a circle of radius 1 cm is moving inside and along the sides of the triangle, then the locus of the centre of the circle is an equilateral triangle of side is

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

The average age of 36 students in a group is 14 years. When the teacher's age is included in it, the average increases by one. The teacher's age in years is

In a class of 39 students there are 36 girls. The average weight of these girls is 38 Kg and average weight of the full class is 40 kgs. What is the average weight of the boys of the class?

What will be the average of all the prime numbers before 19?