Quantitative Aptitude - Arithmetic Ability Questions

If Rajan purchase 21 pens for Rs 20 and sell all the pens at the rate of 20 pens for Rs 21, then what will be the profit percentage?

If a is positive and a2+1a2 = 7, then a3 + 1a3 = ?

A watch shows 6 p.m. where the hour hand points east. In which direction is the minute hand facing when the time is 9.15 p.m?

Area of _____ equals square of its side.

ABC is a right angled triangle. ∠BAC = 90 deg and ∠ACB = 60 deg. What is the ratio of the circum radius of the triangle to the side AB?

The inradius of a equilateral triangle is 10 cm. What is the circum-radius (in cm) of the same triangle?

What is the value of (cot30°+ 2/√3) ?

The ratio of the number of marbles that Joyee and Minati had was 5 : 8 while the ratio of the number of marbles that Jacob and Minati had was 7 : 12. What is the ratio of the number of marbles that Joyee and Jacob had?