Peter invested a certain sum of money on simple interest whose value grew to Rs. 300 at the end of 3 years and to '400 at the end of another 5 years. What was the rate of interest in which he invested his sum?
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2 .
I travel the first part of my journey at 40 km/h and the second part at 60 km/h and cover the total distance of 240 km to reach my destination in 5 hr. How long did the first part of my journey last?
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3 .
If $sec q + tan q \over sec q - tan q$ = $5 \over 3$, then sin 6$\sqrt{39}$ is
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4 .
A trader buys goods at a 19% discount on the label price. If he wants to make a profit of 20% after allowing a discount of 10%, by what % should his marked price be greater than the original label price?
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5 .
The greatest possible length which can be used to measure exactly the lengths 7 m, 3 m 85 cm and 12 m 95 cm is:
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6 .
$(0.04)^ {- 1.5}$ = ?
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7 . Study the following table carefully and answer these questions:
The average of number of staffs of A, B, C, D and E is
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8 . Study the following table carefully and answer these questions:
The sum of the number of staffs of D and E is ..... % less than the sum of the number of staffs of A and B
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9 . Study the following table carefully and answer these questions:
The sum of the number of staffs of A and E is _____ % less than D
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10 .
What is 40% of 50% of $3\over 4$ of 3200 ?
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