Question from an IQ test

[Barenaked]

I can not figure this one out for the life of me. Can some one give me the answer and explain why.

7. John likes 400 but not 300; he likes 100 but not 99; he likes 2500 but not 2400. Which does he like?

900
1000
1100
1200

[Zwitterion]

He likes 1000?

All the ones he don't like are multiple of 3, and the ones he like are the one he don't like plus one in certain digit. So 900 and 1200 are out. 1000 is 900 plus one on the third digit, but 1100 is plus 2 so it's also out.

Just my guess.

[Barenaked]

Originally posted by Zwitterion
He likes 1000?

All the ones he don't like are multiple of 3, and the ones he like are the one he don't like plus one in certain digit. So 900 and 1200 are out. 1000 is 900 plus one on the third digit, but 1100 is plus 2 so it's also out.

Just my guess.

I dont really get it. I was with you all the way up to the word "He"

[Zwitterion]

He don't like 300, 99, 2400, which are all multiple of three. The ones he like, 400, 100, 2500 are result of 300+100, 99+1, 2400+100. which means use the ones he don't like to plus 1*10^x, (1, 10, 100 etc.), will result in a number he like.

In the answer, 900 and 1200 are out because they are multiple of three. 1100 cannot be because it is 900 (multiple of three) plus 200 (not 1*10^x), 1000 is 900 plus 100, filling in all the criteria in the first paragraph. (not being multiple of three, but is a number itself is a multiple of three plus 1*10^x, x being a whole number.

Hope I'm more clear this time, not very good at explain these stuff.

[gdowkpc]

he likes these #'s
1*1*100=100
2*2*100=400
3*3*100=900
4*4*100=1600
5*5*100=2500
6*6*100=3600
7*7*100=4900
8*8*100=5600
9*9*100=8100
ect....

[Barenaked]

Originally posted by gdowkpc
Look at the factors of numbers he likes and dislikes.

400 = 222255;
100 = 2255;
2500 = 225555;

300 =355;
99 = 3311;
2400 = 22222355.

The numbers he likes are all perfect squares and are only made up of 2's and 5's. Based on the given information there are two logical answers:

900, since it is a square, and
1000, since 1000 = 22255.

Yea Ok. :rolleyes: LOL Thanks alot.

[Barenaked]

I give up. Math was never my subject anyway.

[gdowkpc]

Disregard my first post, the second makes more sense. I did the math for you. ;)

[txinvestigator1]

you guys are smart ;)

[gdowkpc]

Google is GREAT!

[Barenaked]

Originally posted by gdowkpc
Google is GREAT!

LMAO. Is that how you answered that question in the Restricted area also?

[gdowkpc]

That's how I answered this one. I don't know what you are talking about with the Restricted Section, though

I would have figured this out on my own after a few minutes if I'd just gone after it. There are really only a few functions to try, and square root and powers are very popular.


EDIT - I figured out the answer on the Restricted Areas by looking at your profile.

I have no "FREAK" powers.

[Barenaked]

Originally posted by gdowkpc


EDIT - I figured out the answer on the Restricted Areas by looking at your profile.

I have no "FREAK" powers.

Dang, I was hoping you had freak powers.

Now that this thread is over I can take it in a different direction and ask what gdowkpc stands for.

[gdowkpc]

You have to use your powers to find it. It has been answered on the board before :D. Let's have fun with this one!

[Zwitterion]

^^^ God Dangit Oh Why Kiss Parking Cops. :p :D