Quantitative Aptitude - Arithmetic Ability Questions

If in 2 years at simple interest the principal increases by 18%, what will be the compound interest (in Rs) earned on Rs 7000 in 3 years at the same rate?

The sum of two numbers is 25 and sum of their square is 313. Calculate the numbers.

A man buys 10 oranges for Rs. 3 and sells 8 for Rs. 3. Calculate his gain percent.

Which of the following is TRUE?

The distance between the points (11,­5) and (k,0) is 13. Find k.

3cosA is equal to

If the Arithmetic mean of 7, 5, 13, x and 9 is 10, then the value of x is

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?