Quantitative Aptitude - Arithmetic Ability Questions

A triangle has a perimeter of 200. If two of its sides are equal and the third side is 20 more than the equal sides, what is the length of the third side?

Find co-ordinates of the mid point of the segment joining points C (3,-5) and D (-7,3).

The average weight of P, Q and R is 71 kg. If the average weight of P and Q be 66 kg and that of Q and R be 76.5 kg, then the weight (in kg) of Q is.

The mean of 10 observations is 17. One more observation is included and the new mean becomes 16. The 11th observation is

Of the 3 numbers whose average is 40, the first is 1/3 rd the sum of other 2. What is the first number?

D, E, F are the mid - points of the sides BC , CA and AB respectively of a ΔABC . Then the ratio of the areas of ΔDEF and ΔABC is

Product of digits of a 2-digit number is 24. If we add 45 to the number, the new number obtained is a number formed by interchange of the digits.What is the original number?

Select the odd number from the given alternatives.