The difference of two numbers is equal to 20% of the larger of the numbers. If the smaller number is 40, then find the larger number

Directions: Find the wrong number in the following number series:

4, 5.1, 7.3, 10.6, 15, 20, 27.1

A merchant marked the price of an article by incresing its pro- duction cost by 40% .Now he al- lows 20% discount and gets a profit of Rs. 48 after selling it. The production cost is 

What is the degree of the differential equation $$y=x\left({dy\over dx} \right)^2+ \left({dx\over dy} \right)^2 ? $$

If a = 2·361, b = 3·263 and c = 5·624, then the value of a³ + b³ – c³ + 3abc is

What approximate value should come in the place of question mark (?) in the following question?

11.92 + 3(-2.18 × 2.97) - (17.98 ÷ 5.96) = ?

At what rate per cent per annum will a sum of money double in 8 years?

The sum of the two - digit number is 6 and the number and its flip (digits written in reverse order) both are multiples of 3. If the difference between them is 36, then which of the following is the required number and its flip?