Q16: If 270 kg of corn would feed 42 horses for 21 days, for how many
days would 360 kg of corn feed 21 horses?
Q17: I varies directly as m, and I is equal to 5 when m = 2/3. Find I when
m = 16/3.
Q18: If a car covers 102 km in 6.8 litres of petrol, how much distance will
it cover in 24.2 litres?
Q19: The cube of a number is 8 times the cube of another number. If the
sum of cubes of numbers is 243, what is the difference of the numbers?
Q20: A train travels 112 km in 1 hour 30 minutes with a certain speed.
How many kilometres it will travel in 4 hours 45 minutes with the same
speed?
Q21: A garrison of 120 men has provisions for 30 days. At the end of 5
days, 5 more men joined them. How many days can they sustain on the
remaining provision?
Q22: Mahesh sells two tables for Rs. 3000 each. He gains 20% on one
table and on the other he loses 20%. Find his gain or loss percent on
whole transaction.
Q 23: My grandmother says in her childhood milk was at Rs.2 per litre. It
was Rs.36 per litre today. By what percentage has the price gone up?
Q24: The cost of a toy car is Rs. 140. If the shopkeeper sells it at a loss of
10%. Find the price at which it is sold
Q25: Find the value of (42 × 229) ÷ 3√9261
Q26: Some toffees are bought at the rate of 11 for Rs 10 and the same
number at the rate of 9 for Rs 10. If the whole lot is sold at one rupee per
toffee, find the gain or loss percent on the whole transaction.
Q 27: Parikshit makes a cuboid of plasticine with sides 5 cm, 2 cm, and 5
cm. How many such cuboids will he need to form a cube?
Q28: Using property, find the value of the following:
(i) 192 - 182
(ii) 232-222
Q29: Which of the following triplets are Pythagorean?
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