Quantitative Aptitude - Arithmetic Ability Questions

In the following question, select the odd letter/letters from the given alternatives.

ΔABC is an equilateral triangle and D, E are midpoints of AB and BC respectively. Then the area of ΔABC : the area of the trapezium ADEC is

Find the simple interest on Rs. 50 for 6 months at the rate of 10 paise per rupee per month.

The sum of a fraction and 7 times its reciprocal is 11/2. What is the fraction?

When 0.151515.....is converted into a fraction, then the result is

Solve 675.9995+(3.9989)2 = ? ÷ 16.9900865

A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.

-7.5, 15, -30, 60, ? , 240

Find the odd word/letters/numbers pair from the given alternatives.