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https://www.google.com/books/edition/Singapore_Math_Challenge_Grades_5_8/2htqAgAAQBAJ?hl=en&gbpv=1&pg=PA57&printsec=frontcover

 May 6, 2021
 #1
avatar+120287 
+2

You  have 85  beads

 

85/4  =  21*4  + 1

 

21/4  =  5*4  + 1

 

5/4  =   1* 4  +  1

 

cool cool cool  

 May 6, 2021

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