Not just your normal pattern

Level 2

What is the missing number in this sequence:
2 4 9 28 125 ==?== 5047 40328


The answer is 726.

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1 solution

Kenny O.
Sep 16, 2017

The formula for the n t h n^{th} term is n!+n. The blank is the 6th term, 6!+6=720+6=726.
n! = n ( n 1 ) ( n 2 ) . . . 2 1 n*(n-1)*(n-2)...*2*1

sweet :) i have found the solution like this: 2 4 9 28 125 ? 5047 40328

40328/8= 5041 +6 5047/7=721 +5 ?/6 = ? +4 = 125 = 121*6 125/5=25 +3 = 28 28/4=7 +2 = 9 9/3=3 +1 = 4 4/2=2 +0 =2

andrea stefanoni - 2 years, 1 month ago

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