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@machel posted:

please can someone work this out ( disclaimer, brain burn out at your own peril)

1, 3, 3, 7, 9, 11,  ?

tbh can't find any pattern at all I wonder if it was  a misprint in the practice paper ??? like dameee said  should the 3 should be 5 ?????

Rocking Ros Rose
Last edited by Rocking Ros Rose

tbh can't find any pattern at all I wonder if it was  a misprint in the practice paper ??? like dameee said  should the 3 should be 5 ?????

Well I couldn't do it...so tried to cheat
But none of the solving sites knew the answer either ??

slimfern
@machel posted:

Yes, 1, 3, 3, 7, 9, 11, ?

it is on a test practice paper for the 11+,  no answers supplied!

bloody hell, we've a forum full of older people that can't solve it @El Loro we need help

Dame_Ann_Average
Last edited by Dame_Ann_Average
@El Loro posted:

If the second 3 is not a misprint then the answer is 27, if it should be a 5 then 13.

I would agree with EL. There's no single clear pattern, so - assuming there's not a misprint - the two "3"s suggest two interweaved series:

1, 3, 3, 7, 9, 11, ?

The first series is 1, 3, 9, ? - this is 3 to the power of x, where x = 0 to 3, so "?" = 3 cubed = 27.

The second series is 3, 7, 11 - this is adding "4" each time, so the next number in the series after "?" would be 15.



There's still not that much info, IMO, to be certain that's what's going on, though. I'd want to see some of the other questions on the paper to confirm they're definitely doing interweaved series as part of the test.

Eugene's Lair
Last edited by Eugene's Lair
@machel posted:

We looked at this but there isn’t a sequence, has to be a misprint!  Brain well and truly fried 🤪😜🤪😜

The sequence doesn't have to be in the basic figures, but can be in the RELATION between the basic figures, or even the relation between what is relating the basic figures!

Extremely Fluffy Fluffy Thing

Hi! Mother in law finally had her surgery scheduled, then postponed, then cancelled. After a major protest and a lot of phone calls she is on the schedule for surgery on Monday. Really scared they will cancel again she is in agony snd this has been going on for months. Everything crossed! 🤞

FM
@Former Member posted:

Another easy one…

3 3 5 4 4 3 5 5 ?

"1"?

I'm assuming the sequence is a series of 3-digit numbers: the first two digits increase by 1 and the third decreases by two.

(...or to put it another way, you've got a series of 3-digit numbers, and your adding "108" each time...)

Eugene's Lair
Last edited by Eugene's Lair

"1"?

I'm assuming the sequence is a series of 3-digit numbers: the first two digits increase by 1 and the third decreases by two.

(...or to put it another way, you've got a series of 3-digit numbers, and your adding "108" each time...)

Hello!

Nope. You are going to hate yourself!

FM
Last edited by Former Member

Coming in a bit late here...

This is a really nice puzzle: for those who haven't seen it before, it's usually presented like this:

Did you ever read Edward De Bono? Fascinating guy, my favorite of his ideas was to solve the problem of slow elevators, rather than coming up with a solution to speed them up, he suggested putting mirrors in the lobby instead!

FM

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