Unitary method and percentage Quiz - ICSE Class 7 Mathematics

Free practice quiz: Unitary method and percentage (ICSE Class 7 Mathematics). 55 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

Sample questions

1. If 3 kg of sugar costs Rs. 150, what is the cost of 5 kg of sugar?

   1. Rs. 200
   2. Rs. 250
   3. Rs. 300
   4. Rs. 350
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   Answer: B. Rs. 250

   First, find the cost of 1 kg of sugar. Cost of 1 kg = Rs. 150 / 3 kg = Rs. 50/kg. Then, calculate the cost of 5 kg. Cost of 5 kg = 5 kg * Rs. 50/kg = Rs. 250.

2. What percentage of 50 is 20?

   1. 30%
   2. 35%
   3. 40%
   4. 50%
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   Answer: C. 40%

   Let the percentage be 'p'. (p/100) * 50 = 20. p * 50 = 20 * 100. p * 50 = 2000. p = 2000 / 50 = 40. So, it is 40%.

3. What is 75% of 200?

   1. 120
   2. 150
   3. 180
   4. 200
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   Answer: B. 150

   75% of 200 = (75/100) * 200 = 75 * 2 = 150.

4. A shopkeeper buys a pen for Rs. 100 and sells it at a loss of 15%. What is the selling price?

   1. Rs. 75
   2. Rs. 80
   3. Rs. 85
   4. Rs. 90
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   Answer: C. Rs. 85

   Cost Price = Rs. 100. Loss = 15% of Cost Price = (15/100) * 100 = Rs. 15. Selling Price = Cost Price - Loss = Rs. 100 - Rs. 15 = Rs. 85.

5. A bag contains apples and oranges in the ratio 4:3. If there are 28 fruits in total, how many apples are there?

   1. 12
   2. 14
   3. 16
   4. 18
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   Answer: C. 16

   The total ratio parts are 4 + 3 = 7. The number of apples is (4/7) of the total fruits. Number of apples = (4/7) * 28 = 4 * 4 = 16.

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