Lol, simple math) can you solve it?

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lexa500

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allright. so this one is just for fun, so i decided to share with BHW:

we have a heap of cucumbers, laying on the floor.
the heap weights 100 kilograms.
We know that, the cucucmbers consist by 99% of water (not very good, but we have what we have)
After the water vaporised, our heap was by 98% of water.
Can you calculate, what will be weight of the heap after vaporisation?
 
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if 3+5+7+.........+n terms/ 5+8+11+............+10 terms =7

the value of n (cucumber) is

a) 35 b) 36 c) 37 d) 40

2. if A,B,C are the points of the cucumber - z1,z2,z3 ant the angles B and C are each pie- alpha/2 then (z2-z3)^2 = 4(z3-z1)(z1-z2) sin^2 alpha/2

Answer = 99.484759
 
lexa500 said:
allright. so this one is just for fun, so i decided to share with BHW:

we have a heap of cucumbers, laying on the floor.
the heap weights 100 kilograms.
We know that, the cucucmbers consist by 99% of water (not very good, but we have what we have)
After the water vaporised, our heap was by 98% of water.
Can you calculate, what will be weight of the heap after vaporisation?
Click to expand...

what does "our heap was by 98% of water" mean? do you mean the water in the cucumber was decreased by 98%? if so then the answer would be 2.98kg, because 99% of it is water and if 98% of the water evaporated that would be 98% of 99% which is 97.02% of the total weight gone so it would be 2.98% of 100kg which is 2.98KG
 
no again. not 99, not 2 or 3.
you can guess it, but it is not interesting.
 
0. After everything vaporizes you have nothing left in the heap. So 0, notta, zilch, nothing.
 
cool.dude123 said:
what does "our heap was by 98% of water" mean? do you mean the water in the cucumber was decreased by 98%? if so then the answer would be 2.98kg, because 99% of it is water and if 98% of the water evaporated that would be 98% of 99% which is 97.02% of the total weight gone so it would be 2.98% of 100kg which is 2.98KG
Click to expand...

i meant that cucumbers consisted of water
the water was 99% before, 98% after vaporisation
 
lexa500 said:
allright. so this one is just for fun, so i decided to share with BHW:

we have a heap of cucumbers, laying on the floor.
the heap weights 100 kilograms.
We know that, the cucucmbers consist by 99% of water (not very good, but we have what we have)
After the water vaporised, our heap was by 98% of water.
Can you calculate, what will be weight of the heap after vaporisation?
Click to expand...
after reading again it makes more sense if you replace "by" with "of" so "After the water vaporised, our heap was of 98% of water." so it started with 99% water and now its 98% water.

so work out the dry weight which would be 1% of 100kg which is 1kg. so:
so 2% = 1kg (dry weight stays the same) making 98% = 49kg of water. so the total weight would be 50KG

checking:
now 98% of 50 = 49, 49 + 1kg (dry weight) = 50Kg
 
cool.dude123 said:
after reading again it makes more sense if you replace "by" with "of" so "After the water vaporised, our heap was of 98% of water." so it started with 99% water and now its 98% water.

so work out the dry weight which would be 1% of 100kg which is 1kg. so:
so 2% = 1kg (dry weight stays the same) making 98% = 49kg of water. so the total weight would be 50KG

checking:
now 98% of 50 = 49, 49 + 1kg (dry weight) = 50Kg
Click to expand...
correct) that was faster than i thought)
 
lexa500 said:
correct) that was faster than i thought)
Click to expand...
really? ok I have a question for you.

if the ratio of male to female in a building is 8:12 what is the probability that when 8 are picked at random 5 are female and 3 are male?

EDIT: I guess that was a bit harsh, but the answer is 0.27869184, or 27.869184%. the calculation is 8C5*((12/20)^5)*((8/20)^3). 8C5 is 8 choose 5, its binomial distribution.
 
Last edited:
I was confused like others by the line "After the water vaporised, our heap was by 98% of water. Can you calculate, what will be weight of the heap after vaporisation?". I would have phrased it, "After some of the water evaporated, the cucumbers are now 98% water. What is the current weight of the cucumbers?"

Good on Cool.dude123 on fingering it out. ;)
 
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