## 36. An army lost 10% of its men in war. 10% of the remaining died due to disease and 10% of the rest were declared disabled. Thus the strength of the army was reduced to 729000 active men. The original strength of the army was :

## 37. In an examination, 35% of total students failed in Hindi, 45% failed in English and 20% failed in both. Find the percentage of those students who passed in both the subjects ?

## 38. The price of an article was increased by r%. Later the new price was decreased by r%. If the latest price was Rs. 1, then the original price was :

## 39. The difference of two numbers is 15% of larger sum. The ratio of the larger number to the smaller number is :

## 40. A number if reduced by 25% becomes 225. By what percent should it be increased so that it becomes 375 ?

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