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More ways to get Braingle...

Familiar Numbers

Series teasers are where you try to complete the sequence of a series of letters, numbers or objects.

 

Puzzle ID:#48894
Fun:*** (2.14)
Difficulty:* (0.79)
Category:Series
Submitted By:SneakattackAus***!!

 

 

 



What number comes next?

7, 4, 1, 8, 5, ?



Answer

The next number is 2.

If you go vertically down and from left-to-right on the numeric keypad on your keyboard, you will get those numbers. This is what a numeric keypad looks like:

7 8 9
4 5 6
1 2 3

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Comments

SneakattackAus*
Jul 23, 2011

This is my first brainteaser.
SUPD200
Jul 23, 2011

Nice brainteaser!



I was thinking of subtracting 3 to each number, since when you subtract 3 to 1, you get -8, but I saw no negative sign.
DemonLord8tus*
Jul 24, 2011

Nice teaser! I thought the pattern was -3 then +7....

7-3=4
4-3=1
1+7=8
8-3=5
5-3=2
opalrose25*us
Jul 24, 2011

Great teaser but I didn't have a keyboard in front of me since I did it on my iPad
dancingrobots_tus*
Jul 24, 2011

I did it as Seven has 5 letters.
The next has 4 then 3.
Then i started again at Eight with 5 letters.
And so you would need another number with 3 letters, so i got TWO.
Its a sequence of 5-4-3, 5-4-3.
SneakattackAus*
Jul 25, 2011

Interesting observation dancingrobots
xdbtcpAus*
Jul 25, 2011

I got it right, but I was going 'up' on my phone instead of 'down' on the keyboard...
KronosAus*
Jul 25, 2011

I got it the same way as Demon. Good job. Fun but easy.
Mandy7us*
Jul 27, 2011

y r u named kronos? u no thatz the name of the evil Titan lord in the Greek stories? ugh
lolia
Jul 31, 2011

i got it right and yeh it was fun but easy
Brain1231994Aca
Aug 01, 2011

I have a laptop (which means 0 key pad)
dishagarg*in*
Jun 07, 2012

mine ws a diff approach...dint any1 notice that the numbers in the series are those of the units place digits dat occur in the 7's table
rashadAma*
Oct 30, 2012

In another way :

7 - 3 = 4
4 - 3 = 1

Now just imagine the numbers from 0 to 9 as a chain circle, so 0-1=9 and 4 - 7 = 7.
Then :

1 - 3 = 8
8 - 3 = 5
5 - 3 = 2
kitty-cattus*
Feb 26, 2013

Well, I'm on a laptop. Got it anyway...thought about what a computer keyboard would look like.
spikethru4*au*
Feb 26, 2013

On most keypads, 0 is directly below 1 (as a double-width key), so you could introduce 0 into the series to make it a little harder and throw off the mathematical reasoning.

7, 4, 1, 0, 8, 5, ...



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