CBSE ADDA

1. Calculate the amount and compound interest on (a) Rs 10,800 for 3 years at 12.5% per annum compounded annually (b) Rs 18,000 for 2.5 years at 10% per annum compounded annually(c) Rs 62,500 for 1.5 years at 8% per annum compounded half yearly.(d) Rs 8,000 for 1 year at 9% per annum compounded half yearly(e) Rs 10,000 for 1 year at 8% per annum compounded half yearly. 2. Kamala borrowed Rs 26,400 from a Bank to buy a scooter at a rate of 15% p.a. compounded yearly. What amount will she pay at the end of 2 years and 4 months to clear the loan? 3. Fabina borrows Rs 12,500 at 12% per annum for 3 years at simple interest and Radha borrows the same amount for the same time period at 10% per annum, compounded annually. Who pays more interest and by how much? 4. I borrowed Rs 12,000 from Jamshed at 6% per annum simple interest for 2 years. Had I borrowed this sum at 6% per annum compound interest, what extra amount would I have to pay? 5. Vasudevan invested Rs 60,000 at an interest

CBSE MATH STUDY AND CBSE MATH COMPLETE STUDY Q1. Express the following rational numbers in standard form: (i) 24/64 (ii) 36/63 (iii) −12/30 Q2. Which of the two rational number is greater in the given pairs? (i) −43or−87 (ii) 4−5or−710 (iii) −125or−3 Q3. Express −42/98as a rational number with denominator 7. Q4. Represent 2/3on the number line. Q5. Represent −3/5on the number line. Q6. Find the additive inverse of the following: (i) 5/9 (ii) 9/−11 Q7. Add the following rational numbers: (i) 58 and−712 (ii) −516 and 724 Q8. Using the rearrangement property find the sum: (i) 43+ 35+ (−23)+(−115) (ii) (−67)+(−56)+(−49)+ (−157 ) Q.9.Rita had Rs300. She spent 1/3of her money on notebooks and 1/4of the remainder on stationery items. How much money is left with her? Q10. Find each of the following products: (i) 35×−78 (ii) −611×−53 Q11. Fill in the blanks: (i) −2317×1835 = 1835×... (ii) −38×−719= −719 ×... Q12. Find the multiplicative inverse (i.e. reciprocal) of the following: (i) 13

1. If a die is thrown once, what is the probability of getting a prime number? 2. A coin is tossed 200times and tail is obtained 128 times. Now, if a coin is tossed at random, what is the probability of getting a tail? 3. In 100 throws of a dice, 5 is obtained 42 times. In a random throw, what is the probability of getting a 5? 4. A bag has 6 red balls and 8green balls. A ball is drawn from a bag without looking in to the bag. What is the probability of getting a green ball? 5. What is the probability of occurrence of an event? 6. There are 216workers in a factory and in which 75are laborers. What would be the central angle of the sector representing laborers in the pie chart ? 7. If 45%of the people residing in a locality are Hindus, then what is the central angle of the sector representing the Hindus in the pie chart? 8. The weekly pocket expenses (in rupees) of 30students of a class are given below: 62 ,80 ,110 ; 75 ; 84 ; 73 , 60 , 62, 100

PH: 9835859669     JSUNIL TUTORIAL    PUNJABI COLONY GALI01 Class 8 th  Volume and surface Area Q1. The diameter of a closed cylindrical water storage tank is 14mand its height is 20m. Find the capacity of the tank. Q2. A cylindrical tank has a capacity of 5632m3. If the diameter of its base is 16m, find its depth. Q3. The volume of a circular iron rod of length 5cmis 3850cm3. Find its diameter. Q4. The diameter of a closed cylindrical water storage tank is 14m and its height is 20m. Find the capacity of the tank. Q5. Find the volume of the cylinder whose base radius is 3mand height is 12m. Q6. Find the volume of a cube whose total surface area is 486cm2.

CBSE ADDA PH: 9835859669                                                                                       MATHEMATICS Class 8 th          JSUNIL TUTORIAL    PUNJABI COLONY GALI 01 FINAL Examination 2011 1.      6 oxen or 8cows can graze a field in 28days. How long would 9 oxen and 2 cows take to graze the same field? 2.      70 patients in a hospital consume 1350litresof milk in 30days. At the same rate, how many patients will consume 1710litresin 28days? 3.      Five machines, when operated for 9hourseach day can harvest a farm in 16days. How many days would 8machines take to harvest the same farm, if each machine is now operated for 10hoursa day? 4.      If 20 men can build a 112 m long wall in 6days, what will be the length of a similar wall that can be built by a 25men in 3days? 5.      Two parallel sides of a trapezium are of lengths 3.2cm and 4cm   respectively, and the distance between them is 6 cm. Find the area of the trapezium. 6.      Find the area of the trapezium