Quantitative Aptitude - Arithmetic Ability Questions

In an isosceles triangle, the length of each equal side is twice the length of the third side. The ratio of areas of the isosceles triangle and an equilateral triangle with same perimeter is

If a3+ b3 = 19 and a + b = 1, then what is the value of ab?

The value of 2 Tan53°Cot37°-Cot80°Tan10° ?

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

The average age of Sita and Gita is 30 years. If Rita replaces Sita, then the average age will become 28 years and if Rita replaces Gita, then the average age will become 32 years. What are the respective ages (in years) of Sita, Gita and Rita?

The average marks obtained by a group of 16 students was 20. One student left the group as a result of which the average of the remaining students rose to 21. But another student joined, as a result of which the average marks of the group dropped a bit and became 20.5. What was the average marks obtained by the student who left and the one who joined?

A car travels a certain distance at 70 km/h and comes back at 30 km/h. Find the average speed for total journey.

A merchant marks the price of his articles 30% above the cost price. He gives some discount on it and earns a profit of 13.75%. What is the discount percentage?