Quantitative Aptitude - Arithmetic Ability Questions

A tetrahedron has 4 vertices. How many edges does it have?

The HCF and LCM of two numbers are 3 and 2730 respectively. If one of the numbers is 78, find the other number.

The LCM of 14, 21 and 35 is

α and β are the roots of quadratic equation. If α + β = 8 and α – β = 2√5, then which of the following equation will have roots α4 and β4?

If 49 is subtracted from the square of a number, then the result obtained is 576. What is the number?

Points P and Q lie on side AB and AC of triangle ABC respectively such that segment PQ is parallel to side BC. If the ratio of AP:PB is 2:5, and area of Δ APQ is 4 sq cm, what is the area of trapezium PQCB?

What is the simplified value of 22433+393-11253?

The salary of a person is reduced by 20% . To restore the previous salary, his present salary is to be increased by