1) 18, 14, 12, 11, ?, 10.25
2) 11, 12, 26, 79, 81, 163, 491, 492, ?
I'm posting one puzzle, riddle, math, or statistical problem a day. Try to answer each one and post your answers in the comments section. I'll post the answer the next day. Even if you have the same answer as someone else, feel free to put up your answer, too!
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1) 10.5
ReplyDelete2) 506
1) 10.5. You divide the number shown by 2 and then add 5 for each step in the sequence.
ReplyDelete2)986. The sequence goes multiply by 1 and then add 1, multiply by 2 and then add 2, multiply by 3 and add 1, multiply by 1 and add 2, multiply by 2 and add 1, multiply by 3 and add 2, and then the sequence repeats.
As I said, this was the hardest series.