(5) Is 0.5 the multiplicative inverse of ½? Why or why not ?
(6)Find a rational number between ¼ and 1/2
(7)Represent the following numbers on the number line :-
(i) 5/7 (ii) -3/7 (iii) 12/5 (iv) 3/8 (v) -9/2 (vi) 8/7
(8)Find ten rational numbers between -3/5 and 2/3
(9)Solve the following equations :
(i) x-8=35 (vi) 3x=x+34 (xi) =
(ii) 2x/3=35 (vii) +2=+4 (xii)=
(iii) +x=13 (viii) - =+ (xiii) - =
(iv)7x-9=17 (ix) x+8-=- (xiv)5(x-6)=3(x+7)
(v) 5x+ =x-18 (x)=6 (xv)2(3x-4)-4(2x+7)=4(8x-3)-2
(10) When a number is subtracted from 50, we get 20.Find the number
(11)Twice of a number is subtracted from 7/2, we get thrice of that number. Find the number
(12)The sum of three consecutive odd positive integers is 39.Find the largest number
(13)Two numbers are in the ratio 2:3.If 5 is added to both the numbers, the ratio becomes 3:2. Find the numbers.
(14)The number of boys and girls in a class are in the ratio 7:5. Four years later the sum of their ages will be 56 years,What are their present ages?
(15)Fifteen years from now Ravi’s age will be four times his present age.What is Ravi’s present age ?
(16) Sum of the digits of a two digit number is 7.When we interchange the digits,it is found that the resulting new number is greater than the original number by 45
(17) There is a narrow rectangular plot, reserved for a school. The length and breadth of the plot are in the ratio 2:3. At the rate Rs 50 per metre it will cost Rs 100000 to fence the plot. What are the dimensions of the plot ?
(18) Ravina thinks of a number and subtracts 3/5 from it. She multiplies the result by 7.The result now obtained is 5 times the same number she thought of .What is the number ?
(19) A grand father is ten times older than his granddaughter. He is also 54 years older than her. Find their present ages
(20) Define a rational number also discuss different properties of a rational number
(21) Solve following questions of NCERT book:-
Ex-1.1 Q-6,7 &8
Ex-1.2 Q-3, 5 (i), (ii)
Ex-2.1 Q-7,8 &12
Ex-2,2 Q-3,8,11,14 &16
PISA BASED QUESTIONS
1. Mela
Two sisters Riya and Tanu went to a mela organized in their society on the occasion
of New Year. Their mother gave them Rs. 200. They bought some toys for them.Tanu
spent Rs. 20 more than Riya. When they returned home from the mela, they had Rs.
20 left with them.

1 . Find the amount spent by Riya.
2. Find the amount spent by Tanu.
3. Determine the ratio of amount spent by Tanu to that of Riya.
4. What type of motion is exhibited by Giant-wheel?
2. PARKING-AREA
The parking area of a Mall has a fixed-parking charges of Rs 50 for cars and Rs 20 for
scooters. Further one has to pay Rs 20 per hour for parking his car and Rs 10 per hour
for parking his scooter.

1. Varun came to the mall by his car and paid Rs 130 for the time he spent in the mall.
Find the time spent by Varun in the mall.
2. Find the difference in amount paid by Varun for parking if he would have come by
scooter instead of car.
3. One day Mr.Jagannath went to enjoy a movie “Mission Mangal” of duration3 hours in
the mall and parked his car but due to urgent call from home he had to leave the mall
after 1hours. What would be the difference in amount of payment for parking if he would
have enjoyed the full movie?
4. Area required for Parking a car is 3 times the area required for parking a scooter.
The mall managementwants to convert the parking area wholly either for car or for
scooter. In which case it would be more profitable?
PROJECT WORK-
Build a school project where each structure is represented by different shapes. For example, the rooftop of the school will be in a triangle shape.
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Build a school project where each structure is represented by different shapes. For example, the rooftop of the school will be in a triangle shape.
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