6
1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60
ANSWER: (1, 60) (2, 30) (3, 20) (4, 15) (5, 12) (6, 10)1 * 60 = 602 * 30 = 603 * 20 = 604 * 15 = 605 * 12 = 606 * 10 = 60
10. (Don't ask why.)
10 I think, 60 was reduced by 1/2, 30 by 1/3, 20 by 1/4, 15 by 1/5, so I'm guessing 12 by 1/6,12 - 12/6 = 10
10 The sequence is given by xn = 60/n
60 to 30 _ -1/2 30 to 20 _ -1/3 20 to 15 _ -1/4 15 to 12 _ -1/5 12 - (12*1/6) = 10
60 has 12 divisors (factors): 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60.
LCM(15, 20, 30) = 60
4, 6, 10, 12, 15, 20, 30, 60
4, 6, 10, 12, 15, 20, 30, 60
4, 6, 10, 12, 15, 20, 30, 60
1 2 3 4 5 6 10 12 15 20 30 60...
1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60 -1, -2, -3, -4, -5, -6, -10, -12, -15, -20, -30, -60
1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60
10
4
10