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Let's see how many people get this right?
A ball weighs 10.5 pounds plus half of its own weight.
How many pounds does the ball weigh?
And yes, there is an answer.
I'll edit with the answer later.
6 Answers
- Damon LyonLv 71 decade ago
Let x = the weight of the ball
(10.5 + x/2 ) = x
10.5 = x - x/2
10.5 = x/2
21 = x
So, we're saying that 10.5 plus half of 21 (which is 10.5) is equal to 21. It is
ANSWER
The ball weighs 21 lbs
- PeterLv 61 decade ago
Damon is correct but there's a quicker way to do it without the algebra.
If if weighs <whatever> + 1/2 its own weight, then the <whatever> must logically also be half its weight.
So 10.5 pounds must be half its weight so its weight is 21 pounds.
- vwigutowLv 71 decade ago
You've already said the ball weighs 10.5 pounds, then I think you're asking to add half of that weight to it - 5.25 pounds. So 10.5 +5.25 = 15.75 pounds --------------------
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- Anonymous1 decade ago
11 pounds?
Am i right?
woah sorry typo i meant to put 21
