The price of one eraser is Rs. 3. The value of 20 eraser is equal to the value of three Pens. The value of one pen is equal to the value of two pencils and the value of six pencils is equal to the value of five markers. What is the value of one marker?

Directions : What should come in place of the question mark (?) in the following number series? 

474 459 429 369 249 ?

If efficiency of B increased by $$ {33{1\over 3}{\%}}$$ and A and B start work together, while at the same time C starts destroying the work. Find in how many days work will be completed?

The base of an isosceles triangle is 6 cm and its perimeter is 16 cm. Its area is 

8 men can do a work in 12 days. After 6 days of work, 4 more men were engaged to finish the work. In how many days would the remaining work be completed? 

Simplification 

A shopkeeper marked the price of an article by 40% above cost price and gave discount of Rs. 224. On the final amount, he charged 10% tax. In the whole transaction, he earned Rs. 158.6. Find cost price of the article.

A bar graph showing the height of six mountain peaks. Study the bar graph and answer the following Questions.

The average height of all the peak (in meters) is