Scroll:Whole Numbers >> Four Operations >> ps (504)

Written Instructions:

For each Multiple Choice Question (MCQ), four options are given. One of them is the correct answer. Make your choice (1,2,3 or 4). Write your answers in the brackets provided..

For each Short Answer Question(SAQ) and Long Answer Question(LAQ), write your answers in the blanks provided.

Leave your answers in the simplest form or correct to two decimal places.


 

1)  

Thamarai bought 7400 CD - ROMs at 50 for 21 and sold all of them at 10 for 21.
How much money did Thamarai make altogether


Answer:_______________




2)  

Poongodi bought 8350 CD - ROMs at 50 for 29 and sold all of them at 10 for 20.
How much money did Poongodi make altogether


Answer:_______________




3)  

Keerthi bought 5700 CD - ROMs at 50 for 29 and sold all of them at 10 for 20.
How much money did Keerthi make altogether


Answer:_______________




4)  

Nandini bought 8800 CD - ROMs at 50 for 21 and sold all of them at 10 for 20.
How much money did Nandini make altogether


Answer:_______________




5)  

Ovini bought 5650 CD - ROMs at 50 for 19 and sold all of them at 10 for 22.
How much money did Ovini make altogether


Answer:_______________




6)  

Poovazhagi bought 6200 CD - ROMs at 50 for 26 and sold all of them at 10 for 23.
How much money did Poovazhagi make altogether


Answer:_______________




7)  

Tamilselvi bought 6650 CD - ROMs at 50 for 21 and sold all of them at 10 for 23.
How much money did Tamilselvi make altogether


Answer:_______________




8)  

Chellamal bought 6900 CD - ROMs at 50 for 30 and sold all of them at 10 for 20.
How much money did Chellamal make altogether


Answer:_______________




9)  

Parveen bought 8500 CD - ROMs at 50 for 29 and sold all of them at 10 for 20.
How much money did Parveen make altogether


Answer:_______________




10)  

Nandini bought 5650 CD - ROMs at 50 for 16 and sold all of them at 10 for 22.
How much money did Nandini make altogether


Answer:_______________




 

1)  

Thamarai bought 7400 CD - ROMs at 50 for 21 and sold all of them at 10 for 21.
How much money did Thamarai make altogether

Answer: 12432


SOLUTION 1 :

Step 1:

7400 ÷ 50 = 148

Step 2:

Amount of money she spent on buying the CDs → 148 x 21 

                                                                                            = 3108

Step 3:

7400 ÷ 10 = 740

Step 4:

Amount of money she earned on selling the CDs : 740 x 21

                                                                                            = 15540
Step 5:

Amount of money she made altogether → 15540 - 3108

                                                                                 = 12432



2)  

Poongodi bought 8350 CD - ROMs at 50 for 29 and sold all of them at 10 for 20.
How much money did Poongodi make altogether

Answer: 11857


SOLUTION 1 :

Step 1:

8350 ÷ 50 = 167

Step 2:

Amount of money she spent on buying the CDs → 167 x 29 

                                                                                            = 4843

Step 3:

8350 ÷ 10 = 835

Step 4:

Amount of money she earned on selling the CDs : 835 x 20

                                                                                            = 16700
Step 5:

Amount of money she made altogether → 16700 - 4843

                                                                                 = 11857



3)  

Keerthi bought 5700 CD - ROMs at 50 for 29 and sold all of them at 10 for 20.
How much money did Keerthi make altogether

Answer: 8094


SOLUTION 1 :

Step 1:

5700 ÷ 50 = 114

Step 2:

Amount of money she spent on buying the CDs → 114 x 29 

                                                                                            = 3306

Step 3:

5700 ÷ 10 = 570

Step 4:

Amount of money she earned on selling the CDs : 570 x 20

                                                                                            = 11400
Step 5:

Amount of money she made altogether → 11400 - 3306

                                                                                 = 8094



4)  

Nandini bought 8800 CD - ROMs at 50 for 21 and sold all of them at 10 for 20.
How much money did Nandini make altogether

Answer: 13904


SOLUTION 1 :

Step 1:

8800 ÷ 50 = 176

Step 2:

Amount of money she spent on buying the CDs → 176 x 21 

                                                                                            = 3696

Step 3:

8800 ÷ 10 = 880

Step 4:

Amount of money she earned on selling the CDs : 880 x 20

                                                                                            = 17600
Step 5:

Amount of money she made altogether → 17600 - 3696

                                                                                 = 13904



5)  

Ovini bought 5650 CD - ROMs at 50 for 19 and sold all of them at 10 for 22.
How much money did Ovini make altogether

Answer: 10283


SOLUTION 1 :

Step 1:

5650 ÷ 50 = 113

Step 2:

Amount of money she spent on buying the CDs → 113 x 19 

                                                                                            = 2147

Step 3:

5650 ÷ 10 = 565

Step 4:

Amount of money she earned on selling the CDs : 565 x 22

                                                                                            = 12430
Step 5:

Amount of money she made altogether → 12430 - 2147

                                                                                 = 10283



6)  

Poovazhagi bought 6200 CD - ROMs at 50 for 26 and sold all of them at 10 for 23.
How much money did Poovazhagi make altogether

Answer: 11036


SOLUTION 1 :

Step 1:

6200 ÷ 50 = 124

Step 2:

Amount of money she spent on buying the CDs → 124 x 26 

                                                                                            = 3224

Step 3:

6200 ÷ 10 = 620

Step 4:

Amount of money she earned on selling the CDs : 620 x 23

                                                                                            = 14260
Step 5:

Amount of money she made altogether → 14260 - 3224

                                                                                 = 11036



7)  

Tamilselvi bought 6650 CD - ROMs at 50 for 21 and sold all of them at 10 for 23.
How much money did Tamilselvi make altogether

Answer: 12502


SOLUTION 1 :

Step 1:

6650 ÷ 50 = 133

Step 2:

Amount of money she spent on buying the CDs → 133 x 21 

                                                                                            = 2793

Step 3:

6650 ÷ 10 = 665

Step 4:

Amount of money she earned on selling the CDs : 665 x 23

                                                                                            = 15295
Step 5:

Amount of money she made altogether → 15295 - 2793

                                                                                 = 12502



8)  

Chellamal bought 6900 CD - ROMs at 50 for 30 and sold all of them at 10 for 20.
How much money did Chellamal make altogether

Answer: 9660


SOLUTION 1 :

Step 1:

6900 ÷ 50 = 138

Step 2:

Amount of money she spent on buying the CDs → 138 x 30 

                                                                                            = 4140

Step 3:

6900 ÷ 10 = 690

Step 4:

Amount of money she earned on selling the CDs : 690 x 20

                                                                                            = 13800
Step 5:

Amount of money she made altogether → 13800 - 4140

                                                                                 = 9660



9)  

Parveen bought 8500 CD - ROMs at 50 for 29 and sold all of them at 10 for 20.
How much money did Parveen make altogether

Answer: 12070


SOLUTION 1 :

Step 1:

8500 ÷ 50 = 170

Step 2:

Amount of money she spent on buying the CDs → 170 x 29 

                                                                                            = 4930

Step 3:

8500 ÷ 10 = 850

Step 4:

Amount of money she earned on selling the CDs : 850 x 20

                                                                                            = 17000
Step 5:

Amount of money she made altogether → 17000 - 4930

                                                                                 = 12070



10)  

Nandini bought 5650 CD - ROMs at 50 for 16 and sold all of them at 10 for 22.
How much money did Nandini make altogether

Answer: 10622


SOLUTION 1 :

Step 1:

5650 ÷ 50 = 113

Step 2:

Amount of money she spent on buying the CDs → 113 x 16 

                                                                                            = 1808

Step 3:

5650 ÷ 10 = 565

Step 4:

Amount of money she earned on selling the CDs : 565 x 22

                                                                                            = 12430
Step 5:

Amount of money she made altogether → 12430 - 1808

                                                                                 = 10622