In test #2: 43 = 3+2*20, I've got frob = 37. In test #3: 207 = 17+10*19. I've got frob = 175;
Got same results with Jan.
My apologies gentlemen! I rushed this into print yesterday afternoon. Thanks for the reference Peng. I have fixed the offending answers.
Figurate number triangle
Back to basics 21 - Matrix replicating
Solving Quadratic Equations (Version 1)
Height of a right-angled triangle
Linear system of equations
Spot the rectangle (Part 2)
Find an inscribed square on a closed curve
Rotate and display numbered tile
Balanced Ternary Numbers: Easy as |, |-, |o
Give a matrix that matches itself when rotated
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