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11 plus sequencing - don't understand the answer...help...

(8 Posts)
stroppyknickers Fri 22-Aug-08 11:14:17

ok, am really not getting this. If the sequence is (verbal reasoning):
3, 6, 30, 870 why is the next number 756030????????

Am trying to help (have given in and joined the hysteria) but even with my maths background, I'm still really thick! grin

SqueakyPop Fri 22-Aug-08 11:17:19

3*2 = 6
6*5 = 30
30*29 = 870
870*869 = 756030

LIZS Fri 22-Aug-08 11:17:22

it is the last number x by the number before less 1 ie 30*29=870 so 870x869=756030

AMumInScotland Fri 22-Aug-08 11:17:32

3 times (3-1) is 6
6 times (6-1) is 30
30 times (30-1) is 870
etc...

SqueakyPop Fri 22-Aug-08 11:18:18

so N x N-1 gives you the next number in the sequence

LIZS Fri 22-Aug-08 11:18:22

isn't this non verbal reasoning ?

AMumInScotland Fri 22-Aug-08 11:18:23

grin

stroppyknickers Fri 22-Aug-08 11:22:12

no, this is in my paranoid parents 11 plus fake your way to a top career book under verbal reasoning. not even looked at non verbal reasoning. am so thick. blush thankyou brainiacs.

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