Quantitative Aptitude - Arithmetic Ability Questions

If Tan A = 15/8 and Tan B = 7/24, then Tan (A - B) = ?

Simplify (2/7 + 3/5) / (2/5 + 2/7)

If the ∠ABC and ∠ACB of triangle ABC is 80 deg and 60 deg respectively. If the Incenter of the triangle is at point ‘I’ then calculate angle BIC.

If ABCD is a Cyclic Quadrilateral, then the value of Cos2A - Cos2B - Cos2C + Cos2D is

The denominator of a rational number exceeds its numerator by 10. If the numerator is increased by 4 and the denominator is reduced by3, the number obtained is 5/6. The original rational number is

Find the total surface area (in cm2) of a cuboid of length, breadth and height of 10.5 cm, 8 cm and 9 cm respectively.

Which of the following is correct?

23 x 31 = 713. How much is 0.0713 / 3.1?