# Am I that stupid? Solve this math word problem....

Discussion in 'Community Discussion' started by todd2000, Oct 17, 2012.

1. ### todd2000 macrumors 68000

Joined:
Nov 14, 2005
Location:
Danville, VA
#1
If a block weighs eight kilograms plus half a block, what is the weight of a block and a half?

I'll chime in after a few answers...

2. ### spork183 macrumors 6502a

Joined:
Jul 30, 2006
#2
if it weighs 8kilo + 1/2 a block (4kilos) = 12 kilos for 1 block. so a block and a half would weigh 18kilos.

Now, if the word play is to lock in the weight of a block at 8 kilos, then your 1.5 blocks would be 12kilos.

I'm pretty tired, so if I amusingly punted this one, enlighten (ridicule ) me.

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4. ### angelneo macrumors 68000

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Jun 13, 2004
Location:
afk
#4
1 block weighs 8kg + half a block
half a block weighs 8kg
1 block weighs 16kg
hence, 1 and a half blocks weighs 16+16/2 = 24kg

5. ### todd2000 thread starter macrumors 68000

Joined:
Nov 14, 2005
Location:
Danville, VA
#5
It says the answer is 24, but I'm still stuck at 18...

If 1 block weighs 8kg + half a block, then how can 1/2 a block weight 8kg?

It should be 8kg+4kg = 12kg

1/2 of 12kg = 6kg + 12kg(one block) = 18kg

6. ### swiftaw macrumors 603

Joined:
Jan 31, 2005
Location:
Omaha, NE, USA
#6
ok, suppose a block weighs x kg

Then x = 8 + 0.5 x meaning that 0.5 x = 8 meaning x = 16

The question says, how much does 1.5 blocks weigh,

well 1.5*x = 1.5 * 16 = 24

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Oct 8, 2007
8. ### Hexiii macrumors 65816

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Jun 30, 2011
Location:
Prague, Czech Republic
#8
Yeah, it's not that hard, but if you cannot solve it in your mind, just use the equasion above.

9. ### spork183 macrumors 6502a

Joined:
Jul 30, 2006
#9
ah, quite simple if you use your head. For those like me who locked into the 8kg as a finite weight, think of it like this:
A block weighs 1/2 a block + 8kg. That makes it easier for me to solve. Your mileage may vary...

10. ### leftywamumonkey macrumors 6502a

Joined:
Jun 23, 2010
Location:
California
#10
1 block = 1/2 block + 8kg
subtract 1/2 block from both sides
1/2 block = 8kg
multiply both sides by 2
1 block = 16kg

You need to find the weight of 1-1/2 block.

1block * (1.5) = 16kg * (1.5)
1.5 blocks = 24kg

11. ### iJohnHenry macrumors P6

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On tenterhooks
12. ### Scepticalscribe Contributor

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Jul 29, 2008
Location:
The Far Horizon
#12
Yes, indeed. The immortal answer to, well,.....The Meaning of Life......and almost everything else, too.

13. Oct 18, 2012
Last edited: Oct 18, 2012

### angelneo macrumors 68000

Joined:
Jun 13, 2004
Location:
afk
#13
This might be easier for you to visualize,
Code:
```1 block = 1/2 block + 1/2 block
1 block =    8kg    + 1/2 block
```
Hence,
1/2 block = 8kg,
and 1 block = 8x2 = 16 kg

14. ### Carlanga macrumors 604

Joined:
Nov 5, 2009
#14
Should be Y=1.5X so Y=1.5 * total weight(16) = 24. Reminds me of the SAT's
The key to killing the math part is making every problem like this into a simple formula to solve. Don't get stuck in the semantics of the questions or you will get them wrong.

15. ### peeaanuut macrumors 65816

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Sep 10, 2007
Location:
Southern California
#15
the word play is to get you to lock into the number eight. So you hear 8+half and you think 12, then you add half that and get 18. The idea is to get you to actually use formulas and do the math instead of just going off the only visible number which is 8. The actual math, as the formulas have shown equals out to 24.

16. ### mobilehaathi macrumors G3

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Aug 19, 2008
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The Anthropocene
#16

17. ### samiwas macrumors 68000

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Aug 26, 2006
Location:
Atlanta, GA
#17
Ah ha! This finally made me understand what on earth people here were saying.

18. ### millerj123 macrumors 65816

Joined:
Mar 6, 2008
#18
0 credit. You didn't show your work...