question from some random IQ test....

[G_Dollaz]

not sure if this is the right forum or not as I've never posted anything non-poker related on 2+2 before, so feel free to move/ delete if neccesary....

ok, so I took some random IQ test this morning and got stuck on the following question....

Jack likes 400 but not 300, likes 100 but not 99, and like 3600 but not 3200.

which of the following numbers does Jack like?
A) 900
B) 1000
C) 1100
D)1200


if anyone figures this out, please let me know.... I think I'm halfway through, but will post what I did this so people have the option to not read it if they want to work it by themselves....

[G_Dollaz]

ok, I got 3600-3200= 400, 400-300= 100, and that would leave us with 100-99= 1, meaning that 1 would be a number that he likes... how do we get back from 1 to one of the answer choices?

[ChrisV]

I think this is the answer (spoiler in white):

<font color="white">Jack likes any number which is a perfect square multiplied by 4. Hence he likes:

400 = 4 * 10^2
100 = 4 * 5^2
3600 = 4 * 30^2

And also:

(a) 900 = 4 * 15^2</font>

[ChrisV]

Er. Easier still:

<font color="white">They're all perfect squares. My original solution works too because 4 is a perfect square and multiplying any two perfect squares together yields another perfect square.</font>

[Magic_Man]

The answer is A. Reason: <font color="white"> Jack likes perfect squares. </font>

[thylacine]

[ QUOTE ]
not sure if this is the right forum or not as I've never posted anything non-poker related on 2+2 before, so feel free to move/ delete if neccesary....

ok, so I took some random IQ test this morning and got stuck on the following question....

Jack likes 400 but not 300, likes 100 but not 99, and like 3600 but not 3200.

which of the following numbers does Jack like?
A) 900
B) 1000
C) 1100
D)1200


if anyone figures this out, please let me know.... I think I'm halfway through, but will post what I did this so people have the option to not read it if they want to work it by themselves....

[/ QUOTE ]

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[jay_shark]

He likes 10*10 but not 11*9 . He likes 20*20 but not 10*30 .He likes 60*60 but not 80*40 .

Do you see a pattern now ?

[G_Dollaz]

alright, thanks fella's, I appreciate the help