Brain Teasers
1, 3, 9, 33, 153, 873, 5913, ?
Which number comes next in this sequence?
1, 3, 9, 33, 153, 873, 5913, ?
1, 3, 9, 33, 153, 873, 5913, ?
Answer
46233.1=1!, 3=1!+2!, 9=1!+2!+3!, and so on.
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Comments
tricky but cool
hey i'm the first one!
hey i'm the first one!
Right answer but slightly different method. Starting from the third in the series, I came up with the difference between the last two numbers mulitplied by n, plus the last number.
so the third factor was (3-1)*3+3, 4th was (9-3)*4+9, etc. It works, even though it is messy.
so the third factor was (3-1)*3+3, 4th was (9-3)*4+9, etc. It works, even though it is messy.
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