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Q1. If a database has 10,000 records and 10% of them are marked as inactive, how many active records are there?
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Q2. The price of a fan is reduced by 10% and then further reduced by 20%. If the original price was Rs. 2000, what is the final price?
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Q3. The length of a rectangle is increased by 10% and its width is decreased by 20%. By what percentage does the area of the rectangle change?
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Q4. In a pie chart, the angle for 'Savings' is 72 degrees. What percentage of the total income is saved?
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Q5. If the numerator of a fraction is increased by 20% and the denominator is decreased by 20%, the value of the fraction is increased by:
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Q6. When a sum is divided into two parts in the ratio 4:7, the first part is Rs. 160. The total sum is:
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Q7. A line graph shows the temperature over a week. If the temperature on Monday was 25°C and on Friday was 35°C, what was the percentage increase in temperature?
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Q8. If the cost price of an article is 80% of its selling price, then the profit percentage is:
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Q9. If 50% of a number is added to 50, the result is the number itself. The number is:
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Q10. A dataset contains 500,000 records. If 15% of the records are invalid, and 20% of the valid records are used for training, what percentage of the total dataset is used for training?
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Q11. A train travels 180 km in 3 hours. What is its speed in km per hour?
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Q12. A person spends 60% of his salary on food, 20% on rent and 10% on education. If he saves Rs. 1200, what is his total salary?
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Q13. If the cost price is Rs. 200 and the selling price is Rs. 250, what is the profit percentage?
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Q14. Solve for x: 3x - 7 > 5
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Q15. What is 5% of 400?
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Q16. A student scores 450 marks out of 600. What is the percentage of marks scored?
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Q17. What is 1/4 as a percentage?
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Q18. What is 75% of 40?
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Q19. If a number is increased by 40% and then decreased by 20%, the result is 504. What is the original number?
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Q20. If 60% of a salary is Rs. 18000, what is the total salary?
