Quantitative Aptitude - Arithmetic Ability Questions

∆DEF is right angled at E. If cosD = 5/13, then what is the value of tanF?

The two equal sides of an isosceles triangle is 20 cm each and the third side is 30 cm. What is the area(in cm2) of the triangle?

Deepak marks the price of his table 60% above the cost price. He gives some discount on it and earns profit of 15.2%. What is the discount percentage?

What is the remainder when 6729 is divided by 35?

The reciprocal of the sum of the reciprocals of 2/9 and 7/10 is

If the profit is 20%, then what will be the ratio of cost price to selling price respectively?

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?

x, y be two acute angles, x + y < 90° and sin(2x - 20°) = cos(2y + 20°), the value of tan(x + y) is