Question

Mathemagic!
1. A carpenter has to fix a square-shaped advertisement on to a wooden board.
He fixes nails all along the edges in such a way that there are 27 nails on each
side. How many nails does he use in all?​

Answer 1

Answer:

The four corners of the square have one nail each.

Each side of the square now requires 26 nails (excluding the four corners).

Thus, Total number of nails used = 4 + (4 x 26) = 108.

Answer 2

27) (4) - (4)

=(4) (21)

=104