Quantitative Aptitude - Arithmetic Ability Questions

What is the average of all the one digit, two digit and three digit natural numbers?

Of the 3 numbers whose average is 112, the first is 3/13 times the sum of other 2. The first number is _____.

In ΔABC, D and E are points on side AB and AC respectively. DE is parallel to BC. If lengths of AD, DB and DE are 9 cm, 6 cm and 5.4 cm respectively find length of BC?

What is the value of 99992 x 100008?

(secA - 1)/(secA + 1) is equal to?

3cosA is equal to

If (-1/2) * ( x - 5) + 3 = -5/2, then what is the value of x?

The base of a triangle is half the base of a parallelogram having the same area as that of the triangle. The ratio of the corresponding heights of the triangle to the parallelogram will be