Category Archives: puzzles

Play it again, Sam. Four Fours: 26-50. See my previous post for information.

This is the classic four fours puzzle. You would probably know 1-10 1-25 now. You can use: Addition (+), Subtraction (-), Multiplication (*), Division (/ or fraction bar), Powers (^), Roots (fourthrt/sqrt)(Square roots are the exception to the “Nothing but … Continue reading →

Black to move. What is Black’s best move? Realize that White is to mate in one with Nf6!++

Here we go with home-brews. How is: 8-3=1 True? Answer saturday.

There once was a man who had married thirty women. Yet he never had a wife. How?

Find the error in this mathematical conundrum. Answer Saturday. 1=1 [To start] a=b [Got it?] a•a=b•a [Both sides multiplied by a] a^2=ab [Which is] a^2-b^2=ab-b^2 [Subtraction axiom with b^2] (a+b)(a-b)=b(a-b) [Factored] (a+b)(a-b)/(a-b)=b(a-b)/(a-b) [Divide both sides by (a-b)] a+b=b [Which is] … Continue reading →

I found I had a numbering error earlier in the puzzles and have fixed it. Puzzle 42 is still puzzle 42 for the number sake though.