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Q1. A book is bought for ₹300 and sold at a loss of ₹50. What is the selling price?
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Q2. The number $\sqrt{12}$ is:
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Q3. If the speed of a car is 72 km/hr, what is its speed in meters per second?
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Q4. Which of the following numbers is deficient?
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Q5. In what ratio should a mixture of 30% alcohol and 70% water be mixed with another mixture of 20% alcohol and 80% water, so that the resultant mixture has 25% alcohol?
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Q6. The base of a triangular prism is an equilateral triangle with side 6 cm. If the height of the prism is 10 cm, what is its lateral surface area?
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Q7. A clock strikes once at 1 o'clock, twice at 2 o'clock, thrice at 3 o'clock and so on. How many times will it strike in 12 hours?
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Q8. In what ratio must a shopkeeper mix two varieties of tea, costing Rs. 50 per kg and Rs. 60 per kg, to get a mixture costing Rs. 54 per kg?
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Q9. The ratio of the number of chairs to tables in a room is 7:4. If there are 21 chairs, how many tables are there?
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Q10. Find the number of divisors of 360 that are divisible by 6.
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Q11. A pie chart represents the expenditure of a family. If a sector representing 'Rent' is the largest slice, what does it imply?
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Q12. The table shows the number of students who passed and failed in an exam from different schools. What is the percentage of students who passed from School B?
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Q13. A person travels from A to B at 20 km/hr and returns from B to A at 30 km/hr. The total time taken for the journey is 5 hours. What is the distance between A and B?
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Q14. By selling a chair for Rs. 450, a dealer loses 10%. To gain 15%, he should sell it for:
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Q15. A number that has more than two factors is called a:
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Q16. If the medians of a triangle are in the ratio 1:2:3, then the triangle is:
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Q17. If p is a prime number and (p^k, m) is an amicable pair, which of the following conditions must be true for the sum of the proper divisors of p^k to be m?
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Q18. Which measure of central tendency is most affected by extreme values (outliers)?
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Q19. If a price increases by 100%, it means the price has doubled.
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Q20. A vendor buys oranges at Rs. 10 per dozen and sells them at Rs. 12 per dozen. What is his profit percentage?