Working with Fractions — Quiz

Q1. Tenzin drinks 1/2 glass of milk every day. How many glasses of milk does he drink in one week?

• A. 3 and 1/2 glasses
• B. 7 and 1/2 glasses
• C. 14 glasses
• D. 1/14 glass

Q2. Tenzin drinks 1/2 glass of milk every day. How many glasses did he drink in the whole month of January?

• A. 30 and 1/2 glasses
• B. 62 glasses
• C. 15 and 1/2 glasses
• D. 31/2 glasses

Q3. A team of workers makes 1 km of a water canal in 8 days. In one day the team can make

• A. 1/8 km
• B. 8 km
• C. 1/4 km
• D. 7 km

Q4. A team makes 1/8 km of canal in one day. If they work 5 days a week, how much canal do they make in a week?

• A. 1/40 km
• B. 8/5 km
• C. 13/8 km
• D. 5/8 km

Q5. Manju and her two neighbours together buy 5 litres of oil every week and share it equally among the 3 families. How much oil does each family get in a week?

• A. 15 litres
• B. 3/5 litre
• C. 2 litres
• D. 5/3 litres

Q6. In the multiplication 2/5 × 3 what does the chapter call '2/5' and '3'?

• A. 2/5 is the multiplier and 3 is the multiplicand
• B. 2/5 is the multiplicand and 3 is the multiplier
• C. Both are called multiplicands
• D. Both are called multipliers

Q7. Find 9/7 × 6 and express the answer as a mixed fraction. The answer is

• A. 7 and 5/7
• B. 54/7
• C. 6 and 3/7
• D. 8 and 2/7

Q8. Using the unit-square model the product 3/4 × 2/5 equals

• A. 5/9
• B. 8/15
• C. 2/9
• D. 6/20

Q9. On the chapter links fraction multiplication to area. It says: the area of a rectangle with fractional sides equals

• A. The sum of its sides
• B. Half the perimeter
• C. The difference of its sides
• D. The product of its sides

Q10. In the unit-square model what does the number of rows represent?

• A. The numerator of the multiplier
• B. The numerator of the multiplicand
• C. The denominator of the multiplicand
• D. The denominator of the multiplier

Q11. Brahmagupta's formula works even when a multiplier or multiplicand is a whole number. We rewrite a whole number such as 3 as

• A. 3/1
• B. 0/3
• C. 1/3
• D. 3/3

Q12. Using Brahmagupta's formula the value of 3 × 3/4 is

• A. 6/4
• B. 9/12
• C. 3/12
• D. 9/4

Q13. On, the chapter suggests that while multiplying 12/7 × 5/24, instead of multiplying first and simplifying later, it is better to

• A. Add the numerators and denominators
• B. Convert both fractions to mixed form first
• C. Multiply the denominators first, then the numerators
• D. Cancel the common factor before multiplying

Q14. Using cancellation before multiplying the value of 12/7 × 5/24 in lowest form is

• A. 60/168
• B. 5/7
• C. 1/14
• D. 5/14

Q15. A Class 7 child reads the question 'What is 3/4 of an hour in minutes?' To convert this into a multiplication, the teacher should explain that 'of' here means

• A. Division
• B. Subtraction
• C. Multiplication
• D. Addition