P = 12xy – 10y² – 18x²,

Q = 14x² + 12y² + 9xy, and

R = 5y² – x² + xy

then (P + Q) – R =

A number is first increased by 10% and then it is further increased by 20%. The original number is increased altogether by:

What is the total surface area of a cylinder having radius of base as 7 cm and height as 5 cm?

if x+y =3 and $${1\over x}+{1\over y}= -{3\over 10}$$ then the value of (x²+y²) is :

Anuja owns $$66{2\over 3}\%$$ of a property. If 30% of the property that she owns is worth 1,25,000, then 45% of the value (in) of the property is:

Directions : A bar graph showing the heights of six mountain peaks is given below. Study the bar graph and answer the questions. 

The average height of all the peaks (in metre) is 

Answer the following questions

Rama dealing in bedsheets allows 4% discount on the marked price. What price must be marked on a bedsheet that cost Rs. 480 so as to make a profit of 10%?

The bar chart given below shows the number of tea packets of 2 varieties sold by 5 shops during a particular week.

What is the average number of tea packets sold per shop, both the varieties take together?