Comparing Quant...

A tradesman gives 4% discount on his marked price and gives 1 article free for buying every 15 articles and thus gains 35%. By what per cent is the marked price increased above the cost price ?

The population of a town increases by 5% annually. If the population in 2009 is 1,38,915, what was it in 2006 ?

A shopkeeper fixes the marked price of an item 35% above its cost price. What is the percentage of discount allowed to gain 8% ?

The population of a town was 1,60,000 three years ago. If it increased by 3%, 2.5% and 5%, respectively, in the last three years, then what is the present population?

The population of a village is 10000. If the population increases by 10% in the first year, by 20% in the second year, and due to mass exodus, it decreases by 5% in the third year, what will be its population after 3 years ?

The half life of Uranium - $$233$$ is $$160000$$ years i.e., Uranium $$233$$ decays at a constant rate in such a way that it reduces to $$50\%$$ in $$160000$$ years. in how many years will it reduce to $$25 \%$$?

The population of a town increases annually by $$25 \% $$ if the preset population is $$1$$ crore, then what was the difference between the population three years ago and two years ago?

The annual increase in the population of a town is 10%. If the present population of the town is 180,000, then what will be its population after two years ?

How much per cent more than the cost price should a shopkeeper marks his goods so that after allowing a discount of 20% on the marked price he gains 10% ?

Ramesh bought a calculator with 20% discount on the tag-price. He obtained 10% profit by selling it for Rs.440. What was the tag-price?