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PostPosted: Sat Apr 03, 2010 4:05 pm 
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Joined: Mon May 19, 2008 9:39 pm
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Can anyone answer this one please ....

Find the number that continues the sequence.

11,19,12,17,14,14,17

Answer options are : 8,10,12,14,17

Correct answer is 10 - but I cannot see why!!??

I'm sure it's really obvious but can anyone help?

Thanks :?


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PostPosted: Sat Apr 03, 2010 4:09 pm 
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2 alternating sequences

11, 12, 14, 17 = +1, +2, +3

and

19 17, 14 = -2, -3 so next would be -4 ie 10

next figures are 10 would be 21, 5


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PostPosted: Sat Apr 03, 2010 4:15 pm 
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Thanks soooooo much - of course we can see it when pointed out!! :oops:

Thanks for the help


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PostPosted: Sat Apr 03, 2010 5:27 pm 
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whenever you get quite a long sequence, consider that it is two different runs of numbers, alternating, like here.


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PostPosted: Sat Apr 03, 2010 8:37 pm 
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Milla wrote:
whenever you get quite a long sequence, consider that it is two different runs of numbers, alternating, like here.


Good tip - thanks


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PostPosted: Wed Apr 07, 2010 3:36 pm 
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:D there are two sequences here.
sequence one :

11,-----, 12,-----,14,-------,17,( add 1, add2, add 3, add 4)
sequence two

-------, 19, ------, 17,-----,14,------, { ? ] (minus 2,minus 3, and than the answer minus 4)
hope that helps


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PostPosted: Wed Apr 07, 2010 9:28 pm 
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Thanks SG - It was really obvious when pointed out!! :oops:


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