Wednesday 8 September 2021

Iron ball Pyramid

 In math, we created a pyramid out of iron balls. 

We put fluffy sand as a base to make it stable. 

Answer : The bottom layer has 10 iron balls

                The second layer has 6 iron balls

                The third layer has 3 iron balls

                 The top layer has 1 iron ball

                 The total of balls we used were 20 balls.  






If we put one more layer on the bottom, how many extra iron balls do we need? 


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