A Multiplication Based Logic Puzzle


59 is a prime number. 59 = 1 x 59. Its only factors are 1 and 59. Prime factorization: none.

How do we know that 59 is a prime number? The square root of 59 is an irrational number approximately equal to 7.68. If 59 were not a prime number, then it would be divisible by at least one prime number less than or equal to 7.68. Since 59 is not divisible by 2, 3, 5, or 7, it is a prime number.

59 is never a clue in the FIND THE FACTORS puzzles.

Valentine Puzzle 2014

Valentine’s Day is almost here. Here is a Valentine you can share with your friends who enjoy solving puzzles.

To solve the puzzle, the numbers 1 through 10 need to be written on the top row and also on the first column so that those numbers and the clues inside the puzzle make a multiplication table. Since it’s a level 5 puzzle, it may be a little challenging.

Your friend will not have to wait a whole week for the solution because there is a gif that will solve it quickly and logically. The gif could be the valentine, too.

This week’s puzzles are available in an excel file here. If you have a spreadsheet program on your computer, you can access it. If you enable editing in excel, you can type your answers directly onto the puzzle, and you can also easily print the puzzles.

Here are the factors to last week’s puzzle.

2014-04 Level 5 Answer

2014-04 L-5 steps

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