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1.
The price of apple is first increased by 10% and then decreased by 10%. What is the change in the price of apple?

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2.
The population of a city is 50,000 at present. It increases at the rate of 10% per annum. What will be its population 3 yr from now?

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3.
Income ratio of Ramesh and Suresh is 5:6. Their spending ratio is 7:9. Ramesh saves 4000 and Suresh saves 3000. Income and spending respectively of Ramesh and Suresh are

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4.
In 40 years an amount becomes 6 times the original amount. What is the rate of interest?

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5.
How much money invested at compound interest will yield Rs. 6350.40 at the end of 3 years? For the first year the rate of interest is 5%; for second year it increases to 12% and for third year it decreases to 8%.

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6.
Amit gave his friend Rs. 11000. This was to be repaid in 2 yearly installments with a rate of interest of 20% compounded annually. How much would be the value of each installment?

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7.
Surendra covers a distance by cycle at 18 km/h. He returns to the starting point in a bus at a speed of 45 km/h. Find the average speed for the entire journey.

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8.
Ram and Shyam’s average age is 65 years. The average age of Ram, Shyam and John is 53 years. What is the age of John?

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9.
A can do a work in 3 days. B can do the same work in 6 days and C can do the same work in 7 days. If they work together, in how many days will they take to complete the work?

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10.
When P alone does a work, he takes 25 days more than the time taken by P and Q working together to complete the work. But Q alone takes 9 days more than the time taken by P and Q working together to complete the work. In what time, P and Q together finish this work?

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