18 is a composite number. 18 = 1 x 18, 2 x 9, or 3 x 6. Factors of 18: 1, 2, 3, 6, 9, 18. Prime factorization: 18 = 2 x 3 x 3, which can also be written 18 = 2 x 3².
When 18 is a clue in the FIND THE FACTORS puzzles, use either 2 x 9 or 3 x 6. Only one set of factors will work for any particular puzzle.
“Up on the Housetop” is a famous children’s Christmas carol. Imagine Santa stopping on each housetop to go down its chimney.
Up on the housetop – to solve these puzzles will require you to have knowledge of the multiplication facts and just a little imagination to see the housetops (and maybe the ability to tilt your head for most of them.) Place the numbers 1 – 10 in both the top row and the first column so that those numbers are the factors of the given clues. Click 10 Factors 2013-12-23 to print these puzzles or see last week’s solutions. In order to view the file, you need excel or other comparable spreadsheet program.
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