1.The average age of three boys is 25 years and their ages are in the proportion 3 : 5 :
7. Find the age of the youngest boy.
2.John weighs 56.7 kilograms. If he is going to reduce his weight in the ratio 7 : 6, find
his new weight.
3.The ratio of the no. of boys to the no. of girls in a school of 720 students is 3 : 5. If 18
new girls are admitted in the school, find how many new boys may be admitted so that
the ratio of the no. of boys to the no. of girls may change to 2 : 3.
4.The monthly incomes of two persons are in the ratio 4 : 5 and their monthly
expenditures are in the ratio 7 : 9. If each saves $50 per month, find the monthly income
of the second person.
5. Out of 30 (thirty) students in a class, six students like football, 12 students like cricket
and the remaining students like tennis. Find the ratio of
(i) Number of students that like football to number of students liking tennis.
(ii) Number of students liking cricket to total number of students.
6. Out of 1800 students present in a school, 750 students opted for basketball, 800
students opted for cricket, and the remaining students opted for table tennis. If a student
can choose only one single game, then find the ratio of
(i) Number of students who opted for the sport basketball to the number of students who
chose the sport table tennis.
(ii) Number of students who opted for the sport cricket to the number of students opting
for the sport basketball.
(iii) Number of students who opted for the sport basketball to the total number of
students.
7. A Mother wants to divide ₹ 36 between her two daughters, Shreya and Bhavna, in the
ratio of their respective ages. If the age of Shreya is 15 years and the age of Bhavna is
12 years, find how much money Shreya and Bhavna will receive.
8. Shreya pays ₹ 15000 as rent for 3 months. How much does Shreya have
to pay for a whole year, given that the rent per month remains the same?
9. The cost of 4 dozen bananas is ₹ 180. How many bananas can be purchased for ₹
90?
10. . The weight of 72 books is 9 kg. So What is the weight of 40 such books?
11. A truck requires at least 108 litres of Diesel to cover a distance of at least 594 km.
So How much Diesel will be required by the same truck to cover a distance of around
1650 km?
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