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Conversions | Math Olympiad for Class 5 PDF Download

Q1. A rope is 3.5 kilometers long. How many meters is this?
(a) 350 meters
(b) 3,500 meters
(c) 35 meters
(d) 3,000 meters

Ans: (b) 3,500 meters

1 kilometer = 1,000 meters. So, 3.5 km × 1,000 = 3,500 meters.

Q2. A bag of rice weighs 2.8 kilograms. How many grams is this?
(a) 280 grams
(b) 2,800 grams
(c) 28 grams
(d) 2,000 grams

Ans: (b) 2,800 grams

1 kilogram = 1,000 grams. So, 2.8 kg × 1,000 = 2,800 grams.

Q3. A movie lasts 1 hour and 45 minutes. How many minutes is this in total?
(a) 105 minutes
(b) 90 minutes
(c) 75 minutes
(d) 120 minutes
Ans: (a) 105 minutes

1 hour = 60 minutes. So, (1 × 60) + 45 = 60 + 45 = 105 minutes.

Q4. If 1 USD = 83 INR, how many rupees will you get for 25 USD?
(a) 2,075 INR
(b) 2,000 INR
(c) 1,875 INR
(d) 2,150 INR
Ans: (a) 2,075 INR

To convert USD to INR, multiply by the exchange rate: 25 × 83 = 2,075 INR.

Q5. A toy costs 450 paise. How many rupees is this?
(a) 4 rupees
(b) 4.5 rupees
(c) 45 rupees
(d) 5 rupees
Ans: (b) 4.5 rupees

1 rupee = 100 paise. So, 450 paise ÷ 100 = 4.5 rupees.

Q6. A dog weighs 12 pounds. How many ounces is this?
(a) 180 ounces
(b) 192 ounces
(c) 160 ounces
(d) 200 ounces
Ans: (b) 192 ounces

1 pound = 16 ounces. So, 12 × 16 = 192 ounces.

Q7. Convert 3/4 to a decimal.
(a) 0.75
(b) 0.34
(c) 0.7
(d) 0.8
Ans: (a) 0.75

To convert a fraction to a decimal, divide the numerator by the denominator: 3 ÷ 4 = 0.75.

Q8. A game lasts 300 seconds. How many minutes is this?
(a) 4 minutes
(b) 5 minutes
(c) 6 minutes
(d) 3 minutes
Ans: (b) 5 minutes

1 minute = 60 seconds. So, 300 seconds ÷ 60 = 5 minutes.

Q9. Convert 5/6 to a percentage.
(a) 83.33%
(b) 50%
(c) 66.67%
(d) 80%
Ans: (a) 83.33%

To convert a fraction to a percentage, multiply by 100: 5/6 × 100 = 500/6 ≈ 83.33%.

Q10. Convert 13/4 to a mixed number.
(a) 3 whole 1/4
(b) 2 whole 3/4
(c) 4 whole 1/4
(d) 3 whole 3/4
Ans: (a) 3 whole 1/4

Divide the numerator by the denominator: 13 ÷ 4 = 3 (whole number) with a remainder of 1, so it’s 3 1/4.

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FAQs on Conversions - Math Olympiad for Class 5

1. What are conversions in mathematics?
Ans.Conversions in mathematics refer to the process of changing a measurement from one unit to another. For example, converting inches to centimeters or converting kilograms to grams. It is important in various fields, including science, engineering, and everyday calculations.
2. Why are conversions important for Class 5 students?
Ans.Conversions are important for Class 5 students as they help them understand different measurement systems and improve their math skills. Mastering conversions allows students to solve real-world problems, such as cooking, measuring distance, or understanding heights and weights.
3. What are some common types of conversions students should learn?
Ans.Some common types of conversions that Class 5 students should learn include length (meters to kilometers), weight (grams to kilograms), volume (liters to milliliters), and temperature (Celsius to Fahrenheit). These conversions form the foundation for more complex mathematical concepts.
4. How can students practice conversions effectively?
Ans.Students can practice conversions effectively by using worksheets, online quizzes, and interactive games that focus on measurement units. Additionally, they can apply conversions in daily life situations, like measuring ingredients for a recipe, to reinforce their learning.
5. What tools can help students with conversions?
Ans.Tools that can help students with conversions include conversion charts, calculators, and educational apps designed for learning math. These resources provide quick references and practice opportunities, making it easier for students to grasp the concepts of conversions.
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