Quantitative Aptitude - Arithmetic Ability Questions

The mean deviation of the data 3, 10, 10, 4, 7, 10, 5 is :

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

Two numbers are in ratio 3:4. When 3 is subtracted from both the numbers, the ratio becomes 2:3. Find the sum of the numbers.

If [7(5x/3 - 3/2)]/2 + 3/2 = 1/4, then what is the value of x?

Find the odd one out.

The area of a circle is 616 cm². What is its circumference (in cm).

ΔABC is right angled at B. BD is the altitude. AD is 18 cm and DC is 50 cm. Find length of BD?

A shop keeper allows 20% discount on the marked price on his articles. Find the marked price of an article for which he charges Rs. 740