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Fourth Grade Challenging Math
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4-16)   Find the sequence and fill in the blanks

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

b)  0, 1, 2, 3, 6, 11, 20, __, 68

 

                   

4-17)   A retirement home is going to plant trees around a square shaped pool that is 50 feet on each side. The trees are 5 feet apart. How many trees do they need to plant?

                             

     

 

 

 

4-18)  The 2nd pattern has 4 congruent triangles. The 3rd pattern has 9 congruent triangles.  (Congruent triangles have the same size and shape.)
         a) What should the 4th pattern look like?
         b) How many congruent triangles are there in the 4th pattern?

                           
                             1             2           3             4

 

4-19)  There are 4 people at a party. If each person shook hands once with all the others, how many hand shakes took place at the party?

                                                     

 

4-20)  You need to cut a wooden rod to 35 pieces. It takes 3 minutes to make 1 cut. How long does it take to complete the cuts?

 

 

 

 

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

 

 
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