Quantitative Aptitude - Arithmetic Ability Questions

Two numbers are 10% and 20% lesser than a third number respectively. By how much percent is the second number should be enhanced to make it equal to the first number?

Ravi had five subjects in his final examination. The maximum marks in each subject are 100. If his percentage in four subjects is 80, and he scores 65 marks in the fifth subject, determine his overall percentage for the five subjects.

What is the equation of the line whose y­-intercept is 4 and making an angle of 45° with the positive x-­axis?

D and E are points on side AB and AC of ΔABC. DE is parallel to BC. If AD:DB = 2:5 and area of ΔABC is 98 cm sq, what is the area (in sq cm) of quadrilateral BDEC?

If a + b = 10 and ab- 13 = -ba - 11, then what is the value of 3ab + 4a2 + 5b2 ?

If x2-3x+1=0, then x+1x is (x≠0)

The distance between the points (4, 8) and (k,-4) is 13. What is the value of k?

Find the volume (in cm3) of a cube of side 7.5 cm.