IQ Number series

[Brianwarnock]

Hi,

Just tried an online IQ test and struggled with a couple of questions regarding number series so jotted the last one down to have alook at later, still haven't a clue so thought I'd ask the clever people here to solve it and explain it to me.

BTW I don't have the correct answer.

Q. What is the missing number in this series

18,27,?,125,216

Select from

36,45,46,64,99


Brian

 

[AnthonyGerrard]

Looks like a misprint of 18 for 8 and they are cubes so

64?

 

[Groundrush]

No Idea but found this on Google, not sure if it's the correct one though

1 - 8 - 27 - 64 - 125 - 216
Series of cubes. 1^3 = 1, 2^3 = 8, 3^3 = 27, etc.
Comparable to the easier-to-recognize series of squares: 1 4 9 16 25 36 etc.


http://wiki.answers.com/Q/1_-_8_-_27_-_-_125_-_216

 

[Alansidman]

Brian;

This might be the answer, however the first two numbers are different from what you are showing.

Cube Numbers

A cube number sequence is a mathematical sequence consisting of a sequence in which the next term originates by multiplying the number 3 times with itself, or in other words, raising it to the power of three, in formula:

Xn= n3

An example of this type of number sequence could be the following:

1, 8, 27, 64, 125, 216, 343, 512, 729, …

The next number is made by cubing in this case the 10th number and thus 103 = 10*10*10= 1000.

Or in your case 4 x 4 x 4 = 64

 

[RainLover]

Brian

Could your question be wrong.

If the question was 1, 8, 27, ?, 125, 216 then the answer would have to be 64.

I can see no other sequence.

 

[RainLover]

Wow

Missed it by that much.

 

[Brianwarnock]

Oh s**t, in the question there was no punctuation so looks like my lousy eye sight may have let me down. Thanks to all who answered.

Brian