Quantitative Aptitude - Arithmetic Ability Questions

In a triangle ABC, if ∡A +∡C = 140° and ∡A + 3∡B = 180°, then ∡A is equal to

The average of 12 numbers is 9. If each number is multiplied by 2 and added to 3, the average of the new set of numbers is

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

The sum of two digits of a number is 10. If the digits are interchanged, then its value increases by 18. Find the number.

What is the altitude of an equilateral triangle whose side is 12√3 cm?

Find the approximate simple interest on Rs. 2000 from March 9, 2010 to May 21, 2010 at 8.25% per annum.

AD is the Median of Δ ABC. If O is the centroid and AO = 10 cm then OD is

Sunil started his journey at 2:33:34 p.m. and reached the destination at 4:43:45p.m. Anil started the journey 45 min 27 secs after Sunil and reached the destination 37 mins 16 secs after him. How long did Anil take to complete his journey?