Hilda The Builder Puzzle

The Puzzle:

Hilda was playing with her building bricks when she made a tower like the one below:



How many bricks did Hilda use altogether?

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-\./^\./-


Do you have the answer? Check against our solution!

Our Solution:

While I make no claims to be an expert on perspective drawing, the diagram shows the building made of 22 blocks.



In fact it is possible to add up to 3 other blocks without affecting the three views.