book Maths Puzzle Numerical Ability

What is the algebra fun solution to prove that 1 + 1 = 3?

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book Other Question

I'm trying to find the answers to these problems. I need to simplify?

4(Z + 8) - Z
2(4Y + 6) - 3Y
3(X - 5) + 8X what is the formula for apothems in regular polygons