Math Is Fun Forum

Siva882

Member

Registered: 2018-05-17

Posts: 5

Find number in the series

Here is the series  184, 183, 175, 148, ?, 35

Bob

Administrator

Registered: 2010-06-20

Posts: 10,626

Re: Find number in the series

hi Siva882

Welcome to the forum.

At the moment I cannot see any obvious answer to this.  The differences started nicely as 1, 8 , 27 and then that didn't continue.  Sequence puzzles can be tough.  For any set of numbers you can always fit a formula that will generate the sequence but this is not usually what the puzzle requires.  Sometimes they use a single digit from each term to get the next; or some complicated sum using all the digits.  We have been asked before for next numbers in sequences and the best efforts of several members have not found an answer.  Check you've got the right numbers, please.

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

Alg Num Theory

Member

Registered: 2017-11-24

Posts: 693

Website

Re: Find number in the series

The quartic(degree-4) polynomial in n satisfying the series for n = 1, 2, 3, 4, 6 is:

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Just plug in n = 5 to find the missing number.

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Me, or the ugly man, whatever (3,3,6)

Bob

Administrator

Registered: 2010-06-20

Posts: 10,626

Re: Find number in the series

That's very ingenious!  Why a quartic?

Bob

---

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

Siva882

Member

Registered: 2018-05-17

Posts: 5

Re: Find number in the series

This  was asked in the mock test and was told "?" is 92. When our group tried to do it we didn't get it.
Attaching pic of the question

https://imgur.com/a/I8maD2J