In each of the diamond trees below, you must place each of the digits 1 through 9 in the hexagons according to the pattern in the challenge.
Challenge #3 is for extra credit.
Challenge #1
Place the digits from 1 to 9 in the nine hexagons so that no two adjacent hexagons contain either consecutive numbers or numbers whose names contain the same number of letters.
Challenge #2
Place the digits from 1 to 9 in the nine hexagons so that no two adjacent hexagons contain digits whose sum is a multiple of four or five.
Challenge #3
Place the digits from 1 to 9 in the nine hexagons so that the total of the digits in the hexagons adjacent to any given hexagon is a multiple of the digit in the given hexagon.
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