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7th Grade Challenging Math

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7-16)   October 1st of 2008 is Wednesday. What day of the week is Christmas day, December 25th, 2008?

                      

7-17)   A rectangular prism is 8 centimeters long, 4 centimeters wide and 4 centimeters tall. a) How many 2 x 2 x 2 cm cubes can the prism be cut into? b) What is the total surface area of all the 2 x 2 x 2 cm cubes? c) What is the total volume of all the 2 x 2 x 2 cm cubes?

                                                                          

 

 

7-18)   There are 3 identical wooden blocks that are 50 inches long, 5 inches wide and 2 inches thick. If you glue them together, what is the largest and smallest outer surface area you can get?

 

7-19)   A train is 300 meters long. A tunnel is 2900 meters long. The train travels at 600 meters per minute. How long is the time between the moment the front of the train enters the tunnel and the moment the end of the train exits the tunnel?

                                                                

7-20)   A train is 240 meters long. The train travels at 20 meters per second. It takes 60 seconds for the train to pass the tunnel. How long is the tunnel?

                                                   

 

 

 

More challenging math problems for seventh grade:
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61-70
71-80  81-90

 

 

 
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