# QUIZ: Weakest Link

The Hard Stuff:

What comes next in this sequence:

Iron Bromine Uranium Argon ==?==

Regards,

Steve

Originally posted by Steve Navra
a + b = b
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for this to be true a would have to be 0 ?
so 2a = a
2x0 = 0
which is correct .. or maybe I am reading it wrong

A very smart Nicholas!

Yep zero works.

Steve

Aaaarrggghhh ... I am the weakest link!!!

The subject line says it all!

What comes next in this sequence:

Iron Bromine Uranium Argon ==?==

Fe__Br_____U______Ar______?

? = Y (February)

Anyone know the name of the element Y ??

AND,
Has nobody worked this one out yet??

Perchance, do I have the expert panel stumped?!!

a = 9.999999...
10a = 99.999999...
10a - a = 90
9a = 90
a = 10

How can this be??????????????????????

Regards,

Steve

PS: One would think our very smart moderators could work this out in their sleep

Ooooh!!

A chemistry one, and I missed it!!

Sorry Steve...

Y is Yttrium, by the way, and no, I didn't look it up...

(Usually I only remember the first 20, Applied Chemistry at RMIT was many years ago...)

asy

Oh boy, Steve, you really know how to get a bloke moving ...

Has nobody worked this one out yet??

Perchance, do I have the expert panel stumped?!!

a = 9.999999...
10a = 99.999999...
10a - a = 90
9a = 90
a = 10

How can this be??????????????????????

Steve, dunno what your official answer might say, but this one stems from the fact that we are multiplying a repeating number.

e.g. to help with the understanding, if we multiplied by 1,000,000 rather than by 10, what's happening is magnified somewhat, and becomes understandable.....

and that is:- by multiplying by such a huge number, we move everything 6 places to the left, but, because it is repeating, we DON'T drop 6 places off the right hand end of things !!!

This leads to the anomaly you have shown. Now, I didn't do University maths - perhaps one who has will have a more graceful way of explaining it than I do. But, I KNOW what you've done ........ and it's CHEATING

Regards,

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