1 Find x in the proportion : 6 : x : : 3 : 7
2 Express the ratio 25 cm to 1 m in the simplest form.
3 Find the ratio 18 seconds to 1 hour in the simplest form.
4 Divide Rs 90 in the ratio 3 : 7 .
5 Determine whether the following are in proportion.
a) 2 , 3 , 4 , 5 b) 4 , 6 , 8 , 12
6 16 : 24 = 20 : 30. True or False.
7 5 pens cost Rs 12 . How much will 20 pens cost ?
8 Give the ratio 64 to 88 in the simplest form .
9 A machine prints 1500 newspapers in 45 minutes . How many will it print in 2 hours ?
10 A bullock-cart travels 9 km in 3 hours and a train travels 150 km in 2 hours . Find the ratio of
the speed of the bullock-cart to that of the train?
11 Find the ratio of the number of consonant to the number of vowelsin the word
MATHEMATICS .
12 What is the ratio of the number of prime numbers to the number of composite numbers
between the numbers 1 to 50 with 1 and 50 inclusive ?
13 The ratio of the income to the savings of a family is 15 : 4 . Find the expenditure if the saving
is Rs 2800 .
14 Two numbers are in the ratio 5 : 6 . If sum of the numbers is 132 , find the numbers.
15 First , second and third terms of a proportion are respectively 20 , 18 and 40 . Find its fourth
term.
16 In 5 minutes , Surbhi can prepare 12 letters for mailing . At the same rate , how long will it
take her to prepare 192 letters ?
17 Fill in the blanks :
a) In the proportion , the first and the fourth terms are called ___________ .
b) A ratio has no _____________ .
18 Write True or False
a) The ratio 2 : 5 is the same as the ratio 5 : 2 .
b) The numbers 8 , 10 , 4 , 5 form a proportion .
c) Ratio of 55 paise to 1 rupee is 55 : 1 .
19 12 bags of wheat weigh 90 kg . How much will 20 bags weigh ?
20 Find the value of x in the proportion 9 : 5 : : 36 : x-3
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