Term 2 Life Mathematics Three Marks

8th Standard EM

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Maths

Time : 00:45:00 Hrs
Total Marks : 39
13 x 3 = 39
1. 900 boys and 600 girls appeared in an examination of which 70% of the boys and 85%of the girls passed out in the examination. Find the total percentage of students who did not pass.

2. If x % of 600 is 450 then, find the value of x.

3. When a number is decreased by 25% it becomes 120. Find the number.

4. If the price of Orid dhall after 20% increase is ₹96 per kg, find the original price of Orid dhall per kg.

5. In a leadership election between two persons A and B, A wins by a margin of 192 votes. If A gets 58% of the total votes, find the total votes polled.

6. The income of a person is increased by 10% and then decreased by 10%. Find the change in his income.

7. If the population in a town has increased from 20000 to 25000 in a year, fi nd the percentage increase in population.

8. Akila scored 80%in an examination. If her score was 576 marks, find the maximum marks of the examination.

9. Find the C.I for the data given below:
(i) Principal = ₹4000, r = 5%p.a, n = 2 years, interest compounded annually.
(ii) Principal = ₹5000, r = 4%p.a, n = 1 $\frac { 1 }{ 2 }$ years, interest compounded half-yearly.
(iii) Principal = ₹10000, r = 8% p.a, n = 2 $\frac { 3 }{ 4 }$ years, interest compounded yearly.
(iv) Principal = ₹30000, r = 7% for I year, r = 8% for II year, compounded annually.

10. The population of a town is increasing at the rate of 6% p.a. It was 238765 in the year 2018. Find the population in the year 2016 and 2020.

11. The value of a motor cycle 2 years ago was Rs.70000. It depreciates at the rate of 4% p.a. Find its present value.

12. The bacteria in a culture grows by 5% in the first hour, decreases by 8% in the second hour and again increases by 10% in the third hour. Find the count of the bacteria at the end of 3 hours, if its initial count was 10000.

13. Find the diff erence in C.I and S.I for
(i) P = Rs.5000, r = 4% p.a, n = 2 years.
(ii) P = Rs.8000, r = 5% p.a, n = 3 years.