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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

Free challenging math problems for Kids (1st grade, 2nd grade, 3rd grade, 4th grade, 5th grade, 6 grade and 7th grade)
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