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Fifth Grade Challenging Math

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On this site,
Both x and * are used as multiplication signs.
Both / and 
÷ are used as division signs.

 

5-1)   The following is an square array of 16 dots with 4 rows and 4 columns. The red dots are on the outside of the array. If you use 144 dots to form a square array,
(a) how many rows and columns are there?
(b) how many dots are on the outside of the array?

                                 
                              

                   

 

 

5-2)  Lisa lives on the 9th floor of a building. There are 36 stairs between two connecting floors. How many stairs does Lisa have to climb to reach the 9th floor, starting from the first floor?

                                                                  

 

5-3)  Color all the rectangles so that no adjacent rectangles have the same color. What is the minimum number of colors you need?


                            

 

 

 

5-4)  Color all the shapes so that no adjacent shapes have the same color. What is the minimum number of colors you need?

                             

 

5-5)  Find the sequence and fill in the blanks

    a)   45, 30, 18, 9, __, 0
    b)   2, 5, 11, 23, 47, __, __

 

 

 

More challenging math problems for fifth grade: 
1-5  6-10  11-15  16-20  21-25  26-30  31-35  36-40  41-45  46-50  51-60  61-70  71-80

 

 

 
Free challenging math problems for Kids (1st grade, 2nd grade, 3rd grade, 4th grade, 5th grade, 6 grade and 7th grade) 
This site contains first through seventh grade free math problems with answers that help you with math competitions. Brain teasers, hard math problems that you can practice to prepare for math contests or math competitions such as Math Olympiad Contest, Math Super Bowl and Math Counts

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