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Fourth Grade Challenging Math
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4-51)  Find the sequence and fill in the blanks

      13, 31, 24, 42, 35, 53, ___, ___, 57, 75

 

 

4-52)  Find the sequence and fill in the blanks

          1, 2, 3, 6, 11, 20, __, 68

 

 

4-53)  How many rectangles are here?  

 

                      

 

 

4-54)  A rectangle has a perimeter of 60 cm and length of 20 cm. What is the area of this triangle?

 

 

4-55) If Mary reads 2.1 pages per minute, how many pages does she read in 1.5 hours?

 

 

4-56) Matt starts to read a book on January 1st. If he reads 11.5 pages a day, how many pages would  he have read by the last day of January of the same year?

 

 

4-57) The volume of a cube is 27 cubic centimeters. What is the surface area of the cube?

 

 

4-58) List all cubes of numbers from 1-6

 

 

4-59) The average of 3 numbers is 50. A 4th number is added to the list. The new average is now 100. What is the 4th number?

 

 

4-60) The average of 3 numbers is 20. A 4th number is added to the list. The 4th number is 40. What is the new average (of all 4 numbers)?

 

 

 

More math problems for fourth 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  81-90

 

 

 

 

 

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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