easy and busy
Number Theory
Level
1
in a list of numbers, each number after the first is exactly one third the number immediately preceding it.if the seventh number in the list is 2,what is the 4th number in the list?
63
54
27
45
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1 solution
Let the set be a, b, c, d, e , f, g, .......
So g = 2, this means f=3g and e = 3f and so on.
By this, d comes out to be 2 3 3*3 = 54