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)  

Mithra bought 7900 CD - ROMs at 50 for 17 and sold all of them at 10 for 20.
How much money did Mithra make altogether


Answer:_______________




2)  

Parveen bought 8950 CD - ROMs at 50 for 30 and sold all of them at 10 for 23.
How much money did Parveen make altogether


Answer:_______________




3)  

Panimalar bought 8050 CD - ROMs at 50 for 20 and sold all of them at 10 for 25.
How much money did Panimalar make altogether


Answer:_______________




4)  

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


Answer:_______________




5)  

Swathi bought 7900 CD - ROMs at 50 for 30 and sold all of them at 10 for 21.
How much money did Swathi make altogether


Answer:_______________




6)  

Poongodi bought 6950 CD - ROMs at 50 for 16 and sold all of them at 10 for 24.
How much money did Poongodi make altogether


Answer:_______________




7)  

Indra bought 5400 CD - ROMs at 50 for 18 and sold all of them at 20 for 23.
How much money did Indra make altogether


Answer:_______________




8)  

Swathi bought 8150 CD - ROMs at 50 for 21 and sold all of them at 10 for 24.
How much money did Swathi make altogether


Answer:_______________




9)  

Mithra bought 6450 CD - ROMs at 50 for 11 and sold all of them at 10 for 22.
How much money did Mithra make altogether


Answer:_______________




10)  

Chellamal bought 5000 CD - ROMs at 50 for 16 and sold all of them at 10 for 24.
How much money did Chellamal make altogether


Answer:_______________




 

1)  

Mithra bought 7900 CD - ROMs at 50 for 17 and sold all of them at 10 for 20.
How much money did Mithra make altogether

Answer: 13114


SOLUTION 1 :

Step 1:

7900 ÷ 50 = 158

Step 2:

Amount of money she spent on buying the CDs → 158 x 17 

                                                                                            = 2686

Step 3:

7900 ÷ 10 = 790

Step 4:

Amount of money she earned on selling the CDs : 790 x 20

                                                                                            = 15800
Step 5:

Amount of money she made altogether → 15800 - 2686

                                                                                 = 13114



2)  

Parveen bought 8950 CD - ROMs at 50 for 30 and sold all of them at 10 for 23.
How much money did Parveen make altogether

Answer: 15215


SOLUTION 1 :

Step 1:

8950 ÷ 50 = 179

Step 2:

Amount of money she spent on buying the CDs → 179 x 30 

                                                                                            = 5370

Step 3:

8950 ÷ 10 = 895

Step 4:

Amount of money she earned on selling the CDs : 895 x 23

                                                                                            = 20585
Step 5:

Amount of money she made altogether → 20585 - 5370

                                                                                 = 15215



3)  

Panimalar bought 8050 CD - ROMs at 50 for 20 and sold all of them at 10 for 25.
How much money did Panimalar make altogether

Answer: 16905


SOLUTION 1 :

Step 1:

8050 ÷ 50 = 161

Step 2:

Amount of money she spent on buying the CDs → 161 x 20 

                                                                                            = 3220

Step 3:

8050 ÷ 10 = 805

Step 4:

Amount of money she earned on selling the CDs : 805 x 25

                                                                                            = 20125
Step 5:

Amount of money she made altogether → 20125 - 3220

                                                                                 = 16905



4)  

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

Answer: 17820


SOLUTION 1 :

Step 1:

8100 ÷ 50 = 162

Step 2:

Amount of money she spent on buying the CDs → 162 x 10 

                                                                                            = 1620

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 - 1620

                                                                                 = 17820



5)  

Swathi bought 7900 CD - ROMs at 50 for 30 and sold all of them at 10 for 21.
How much money did Swathi make altogether

Answer: 11850


SOLUTION 1 :

Step 1:

7900 ÷ 50 = 158

Step 2:

Amount of money she spent on buying the CDs → 158 x 30 

                                                                                            = 4740

Step 3:

7900 ÷ 10 = 790

Step 4:

Amount of money she earned on selling the CDs : 790 x 21

                                                                                            = 16590
Step 5:

Amount of money she made altogether → 16590 - 4740

                                                                                 = 11850



6)  

Poongodi bought 6950 CD - ROMs at 50 for 16 and sold all of them at 10 for 24.
How much money did Poongodi make altogether

Answer: 14456


SOLUTION 1 :

Step 1:

6950 ÷ 50 = 139

Step 2:

Amount of money she spent on buying the CDs → 139 x 16 

                                                                                            = 2224

Step 3:

6950 ÷ 10 = 695

Step 4:

Amount of money she earned on selling the CDs : 695 x 24

                                                                                            = 16680
Step 5:

Amount of money she made altogether → 16680 - 2224

                                                                                 = 14456



7)  

Indra bought 5400 CD - ROMs at 50 for 18 and sold all of them at 20 for 23.
How much money did Indra make altogether

Answer: 4266


SOLUTION 1 :

Step 1:

5400 ÷ 50 = 108

Step 2:

Amount of money she spent on buying the CDs → 108 x 18 

                                                                                            = 1944

Step 3:

5400 ÷ 20 = 270

Step 4:

Amount of money she earned on selling the CDs : 270 x 23

                                                                                            = 6210
Step 5:

Amount of money she made altogether → 6210 - 1944

                                                                                 = 4266



8)  

Swathi bought 8150 CD - ROMs at 50 for 21 and sold all of them at 10 for 24.
How much money did Swathi make altogether

Answer: 16137


SOLUTION 1 :

Step 1:

8150 ÷ 50 = 163

Step 2:

Amount of money she spent on buying the CDs → 163 x 21 

                                                                                            = 3423

Step 3:

8150 ÷ 10 = 815

Step 4:

Amount of money she earned on selling the CDs : 815 x 24

                                                                                            = 19560
Step 5:

Amount of money she made altogether → 19560 - 3423

                                                                                 = 16137



9)  

Mithra bought 6450 CD - ROMs at 50 for 11 and sold all of them at 10 for 22.
How much money did Mithra make altogether

Answer: 12771


SOLUTION 1 :

Step 1:

6450 ÷ 50 = 129

Step 2:

Amount of money she spent on buying the CDs → 129 x 11 

                                                                                            = 1419

Step 3:

6450 ÷ 10 = 645

Step 4:

Amount of money she earned on selling the CDs : 645 x 22

                                                                                            = 14190
Step 5:

Amount of money she made altogether → 14190 - 1419

                                                                                 = 12771



10)  

Chellamal bought 5000 CD - ROMs at 50 for 16 and sold all of them at 10 for 24.
How much money did Chellamal make altogether

Answer: 10400


SOLUTION 1 :

Step 1:

5000 ÷ 50 = 100

Step 2:

Amount of money she spent on buying the CDs → 100 x 16 

                                                                                            = 1600

Step 3:

5000 ÷ 10 = 500

Step 4:

Amount of money she earned on selling the CDs : 500 x 24

                                                                                            = 12000
Step 5:

Amount of money she made altogether → 12000 - 1600

                                                                                 = 10400