Thursday, November 4, 2010

I'll Do The Math — US Subtract The "S"


While I’m waiting for the hairs on the back of my neck to settle back down into a greyhoundpelt-like silkyness after my early morning encounter in the bathroom with a SPIDER THE SIZE OF MY HEAD, I’d like to tease your brains with a gentle brain teaser.

Add up the following numbers out loud.
Add them up in the order they are written.
1000
20
30
1000
1030
1000
20
____
????


Answer follows in comments trail.

13 comments:

Whirlochre said...

The answer — of course — is 4100.

What's intriguing is why it should also be 5000 for so many people that it constitutes a reproducable brain teaser.

Anyone know what synapses get fooled here?

McKoala said...

erm, my synapses

Latvialovedoll1877 said...

i am so hot. u want I burn you with beutiful pastry? we dance to REM then mak hot hot sex. i have corgi romntic walks brunete student hot hot hot

fairyhedgehog said...

I made it 5000, yet clearly it isn't. When I checked it, you're right, it's 4100. Now I can't see how I got 5000 in the first place.

You've got my brain working and I'm not sure I like the feeling!

Mother (Re)produces. said...

Oh, dear. What if I got none of the above?

Old Kitty said...

I make it 5000.

So there. Raspberries to you and your synapses! LOL!
p.s.HELLO THERE latvialovedoll1877!! LOL!!

Take care
x

Sylvia said...

I paused at that last 20 - my brain wanted to take 4,080 and add 20 to get the 5,000. I think the trick is that the previous three additions have you focused on the "thousands" column that when you carry the one, you put it there instead of where it belongs.

fairyhedgehog said...

sylvia, so that's how it's done! Now my poor little brain can relax again.

Whirlochre said...

I think Sylvia has it.

All those hours licking her monitor screen have not gone to waste.

jjdebenedictis said...

Boink. Two degrees in physics and I got the wrong answer too. I think Sylvia's correct; the last step is where my brain got tangled.

writtenwyrdd said...

I even double-checked by adding it backwards and still did the same error, adding a zero onto the 100 that the non-thousand bits added up to.

My guess is that if you just gave someone the figures, they'd add it up right. But seeing as we were trying very hard NOT to be fooled, we were.

writtenwyrdd said...

The Latvian Lovedoll is obviously still enamored of you, Whirl. Does she have a think for stripy socks?

Whirlochre said...

Anyone who got 1877 is seriously disturbed.