What is my number? clue 1 my number is a multiple of 5,but it does not end in 5. clue 2 the prime factorization of my number is a string of three numbers. clue 3 two of the numbers in the prime factorizations are the same. clue 4 my number is greater than the seventh square number?

18

step-by-step explanation:

draw the shape and you will see that f and k are actually at adjacent vertices (points of the hexagon that are neighboring).   so find the distance between (1,2) and (4,2).   that is easy since (1,2) and (4,2) is just a vertical distance to count, which is 3.   it is a regular polygon which means all sides are congruent.   you have 6 sides (hexa) so multiply 6 by 3 to receive 18.