Q.1. Find the ratio of (in lowest from) :
(a) 200g to 4 Kg
(b) 80 Paise to ₹2
(c) 30 days to 36 hours
Ans. (a) 1 : 20
(b) 2 : 5
(c) 20 : 1
Q.2. If 3 : x :: 9 : 15 then find the value of x.
View AnswerAns. x = 5
Q.3. Express the following percents as the decimal fraction : (a) 0.07%
(b) 15%
Ans. (a) 0.0007
(b) 0.15
Q.4. Express each of the following percents as fraction in the simplest form :
(a)
(b) 75%
Ans.
(a)
(b)
Q.5. Express each of the following fractions as percent :
(a)
(b)
View AnswerAns. (a) 525%
(b) 45%
Q.6. Find 20% of ₹2500.
View AnswerAns. ₹500
Q.7. Find the whole quantity if 40% of it is 500 km
View AnswerAns. 1250 km
Q.8. In the market cost of 1 dozen bananas are ₹48. Find the cost of 10 bananas.
View AnswerAns. ₹40
Q.9. If the ratio of angles of a triangle is 2:3:4, then find the measure of these angles.
View AnswerAns. 40°, 60°, 80°
Q.10. If 75% of x is 18 then find the value of x.
View AnswerAns. x = 24
Q.11. Chalk contains Calcium, Carbon and Oxygen in the ratio 10:3:12. Find the percentage of Carbon in chalk.
View AnswerAns. 12%
Q.12. In a city, 35% are females, 45% are males, and the remaining are children. What % are children?
View AnswerAns. 20%
Q.13. Compute the Simple Interest on a sum of ₹ 900 for 5 years at the ratio of 6% per annum.
View AnswerAns. ₹270
Q.14. The cost price of 8 books is equal to the selling price of 6 books. Find the gain percent.
View AnswerAns.
Q.15. What principal will amount to ₹ 900 in 6 years at 10% Simple Interest?
View AnswerAns. ₹562.50
Q.16. There are 120 children living in Seemapuri 'J' Black. According to a survey conducted in 2014, out of these 24 children do not go to school" Under the project "School Chale Hum" these students admitted to school based on the above statement answer the following questions.
(a) In 2014, how many children did not go to school?
(b) Under the Project "School Chale Hum" How many children are admitted to school?
Ans. (a) 20%
(b) 100%
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1. What are the basic concepts involved in comparing quantities? |
2. How do you calculate percentage increase or decrease in quantities? |
3. What is the significance of ratios in comparing quantities? |
4. Can you explain how to solve word problems related to comparing quantities? |
5. What are some common mistakes to avoid when comparing quantities? |
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