Multiple choice general knowledge math & puzzles

If M+N+O+P+K=12. Also M+N+O=2, M+O=6 and N+K=8 Then P=?

  1. -2

  2. 2

  3. 4

  4. -4
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A Correct answer
Explanation

From M+O=6 and N+K=8, we get M+O+N+K=14. Since M+N+O+P+K=12, substituting gives 14+P=12, so P=-2. This is a system of linear equations where we can eliminate variables by combining equations. Adding M+O=6 and N+K=8 gives M+O+N+K=14, then comparing with the full equation.

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