Count number of balls on pyramid puzzle

 

 how-many-balls-pyramid-puzzle-with-answer

 

Can you count number of balls on this pyramid?

 

Many people get it wrong but can you find the correct answer. Try it and then compare your answer with the one given below.

 

 

There are 2 possible answers: 30 and 20

 

Answer1 : 30 Balls

 

If Pyramid is square

count-balls-pyramid-puzzle-answer

 

If you remove each layer then you will see this look of each layer:

Square_pyramidal_number-ball-count

 

Answer: 16 + 9 + 4 + 1 = 30

 

Answer2 : 20 Balls

 triangle-pyramid-count-balls-answer

 

Answer: 9 + 7 + 3 + 1 = 20

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