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)  

Tamilselvi bought 5050 CD - ROMs at 50 for 22 and sold all of them at 10 for 21.
How much money did Tamilselvi make altogether


Answer:_______________




2)  

Poovazhagi bought 6800 CD - ROMs at 50 for 30 and sold all of them at 10 for 23.
How much money did Poovazhagi make altogether


Answer:_______________




3)  

Poovazhagi bought 8500 CD - ROMs at 50 for 15 and sold all of them at 10 for 20.
How much money did Poovazhagi make altogether


Answer:_______________




4)  

Swathi bought 8100 CD - ROMs at 50 for 19 and sold all of them at 10 for 24.
How much money did Swathi make altogether


Answer:_______________




5)  

Poongodi bought 7000 CD - ROMs at 50 for 23 and sold all of them at 10 for 23.
How much money did Poongodi make altogether


Answer:_______________




6)  

Mithra bought 5150 CD - ROMs at 50 for 27 and sold all of them at 20 for 21.
How much money did Mithra make altogether


Answer:_______________




7)  

Indra bought 5750 CD - ROMs at 50 for 23 and sold all of them at 10 for 24.
How much money did Indra make altogether


Answer:_______________




8)  

Amutha bought 8600 CD - ROMs at 50 for 13 and sold all of them at 20 for 22.
How much money did Amutha make altogether


Answer:_______________




9)  

Tamilselvi bought 6500 CD - ROMs at 50 for 14 and sold all of them at 10 for 24.
How much money did Tamilselvi make altogether


Answer:_______________




10)  

Ramani bought 6800 CD - ROMs at 50 for 14 and sold all of them at 10 for 21.
How much money did Ramani make altogether


Answer:_______________




 

1)  

Tamilselvi bought 5050 CD - ROMs at 50 for 22 and sold all of them at 10 for 21.
How much money did Tamilselvi make altogether

Answer: 8383


SOLUTION 1 :

Step 1:

5050 ÷ 50 = 101

Step 2:

Amount of money she spent on buying the CDs → 101 x 22 

                                                                                            = 2222

Step 3:

5050 ÷ 10 = 505

Step 4:

Amount of money she earned on selling the CDs : 505 x 21

                                                                                            = 10605
Step 5:

Amount of money she made altogether → 10605 - 2222

                                                                                 = 8383



2)  

Poovazhagi bought 6800 CD - ROMs at 50 for 30 and sold all of them at 10 for 23.
How much money did Poovazhagi make altogether

Answer: 11560


SOLUTION 1 :

Step 1:

6800 ÷ 50 = 136

Step 2:

Amount of money she spent on buying the CDs → 136 x 30 

                                                                                            = 4080

Step 3:

6800 ÷ 10 = 680

Step 4:

Amount of money she earned on selling the CDs : 680 x 23

                                                                                            = 15640
Step 5:

Amount of money she made altogether → 15640 - 4080

                                                                                 = 11560



3)  

Poovazhagi bought 8500 CD - ROMs at 50 for 15 and sold all of them at 10 for 20.
How much money did Poovazhagi make altogether

Answer: 14450


SOLUTION 1 :

Step 1:

8500 ÷ 50 = 170

Step 2:

Amount of money she spent on buying the CDs → 170 x 15 

                                                                                            = 2550

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 - 2550

                                                                                 = 14450



4)  

Swathi bought 8100 CD - ROMs at 50 for 19 and sold all of them at 10 for 24.
How much money did Swathi make altogether

Answer: 16362


SOLUTION 1 :

Step 1:

8100 ÷ 50 = 162

Step 2:

Amount of money she spent on buying the CDs → 162 x 19 

                                                                                            = 3078

Step 3:

8100 ÷ 10 = 810

Step 4:

Amount of money she earned on selling the CDs : 810 x 24

                                                                                            = 19440
Step 5:

Amount of money she made altogether → 19440 - 3078

                                                                                 = 16362



5)  

Poongodi bought 7000 CD - ROMs at 50 for 23 and sold all of them at 10 for 23.
How much money did Poongodi make altogether

Answer: 12880


SOLUTION 1 :

Step 1:

7000 ÷ 50 = 140

Step 2:

Amount of money she spent on buying the CDs → 140 x 23 

                                                                                            = 3220

Step 3:

7000 ÷ 10 = 700

Step 4:

Amount of money she earned on selling the CDs : 700 x 23

                                                                                            = 16100
Step 5:

Amount of money she made altogether → 16100 - 3220

                                                                                 = 12880



6)  

Mithra bought 5150 CD - ROMs at 50 for 27 and sold all of them at 20 for 21.
How much money did Mithra make altogether

Answer: 2626.5


SOLUTION 1 :

Step 1:

5150 ÷ 50 = 103

Step 2:

Amount of money she spent on buying the CDs → 103 x 27 

                                                                                            = 2781

Step 3:

5150 ÷ 20 = 257.5

Step 4:

Amount of money she earned on selling the CDs : 257.5 x 21

                                                                                            = 5407.5
Step 5:

Amount of money she made altogether → 5407.5 - 2781

                                                                                 = 2626.5



7)  

Indra bought 5750 CD - ROMs at 50 for 23 and sold all of them at 10 for 24.
How much money did Indra make altogether

Answer: 11155


SOLUTION 1 :

Step 1:

5750 ÷ 50 = 115

Step 2:

Amount of money she spent on buying the CDs → 115 x 23 

                                                                                            = 2645

Step 3:

5750 ÷ 10 = 575

Step 4:

Amount of money she earned on selling the CDs : 575 x 24

                                                                                            = 13800
Step 5:

Amount of money she made altogether → 13800 - 2645

                                                                                 = 11155



8)  

Amutha bought 8600 CD - ROMs at 50 for 13 and sold all of them at 20 for 22.
How much money did Amutha make altogether

Answer: 7224


SOLUTION 1 :

Step 1:

8600 ÷ 50 = 172

Step 2:

Amount of money she spent on buying the CDs → 172 x 13 

                                                                                            = 2236

Step 3:

8600 ÷ 20 = 430

Step 4:

Amount of money she earned on selling the CDs : 430 x 22

                                                                                            = 9460
Step 5:

Amount of money she made altogether → 9460 - 2236

                                                                                 = 7224



9)  

Tamilselvi bought 6500 CD - ROMs at 50 for 14 and sold all of them at 10 for 24.
How much money did Tamilselvi make altogether

Answer: 13780


SOLUTION 1 :

Step 1:

6500 ÷ 50 = 130

Step 2:

Amount of money she spent on buying the CDs → 130 x 14 

                                                                                            = 1820

Step 3:

6500 ÷ 10 = 650

Step 4:

Amount of money she earned on selling the CDs : 650 x 24

                                                                                            = 15600
Step 5:

Amount of money she made altogether → 15600 - 1820

                                                                                 = 13780



10)  

Ramani bought 6800 CD - ROMs at 50 for 14 and sold all of them at 10 for 21.
How much money did Ramani make altogether

Answer: 12376


SOLUTION 1 :

Step 1:

6800 ÷ 50 = 136

Step 2:

Amount of money she spent on buying the CDs → 136 x 14 

                                                                                            = 1904

Step 3:

6800 ÷ 10 = 680

Step 4:

Amount of money she earned on selling the CDs : 680 x 21

                                                                                            = 14280
Step 5:

Amount of money she made altogether → 14280 - 1904

                                                                                 = 12376