Geniuses know how to answer this? 

You borrow from Mom 50$ and from dad also 50$, you have a total 100$
You buy a pants for 97$ you have rest 3$ ok. Next you give back your mom 1$ and your dad also 1$. Have you rest? 1$.

But if it add up 49$ from mom + 49$ from dad = 98 + 1$ your rest, gives the result 99$
So where is the 1$? 

I made a small illustration to better understand this

It's 49+49-1 = 97

You don't have to add that rest of 1$ to reach 100, but you have to subtract it to get the price of the pants

It's like giving back to your parents 1,5 $ + 1,5$ (the exact rest) => 100 - 1,5 - 1,5 = 97

One for you, j0hny.

Downstairs in your house, there are 3 light switches. Each switch turns on a light bulb upstairs.
You can't see the light bulbs from downstairs.

You can only go upstairs once. How do you find out which switch turns on which light bulb? Took me a couple of minutes to figure that one out without help

Quote from: DarkOne on September 21, 2014, 02:42 PM
One for you, j0hny.

Downstairs in your house, there are 3 light switches. Each switch turns on a light bulb upstairs.
You can't see the light bulbs from downstairs.

You can only go upstairs once. How do you find out which switch turns on which light bulb? Took me a couple of minutes to figure that one out without help

I know it too. It tooks me 5-10 minutes.

S = 1+2+4+8+16+32+...
S = 1+2*(1+2+4+8+16+32+...)
S = 1+2*S
S = -1

Quote from: DarkOne on September 21, 2014, 02:42 PM
One for you, j0hny.

Downstairs in your house, there are 3 light switches. Each switch turns on a light bulb upstairs.
You can't see the light bulbs from downstairs.

You can only go upstairs once. How do you find out which switch turns on which light bulb? Took me a couple of minutes to figure that one out without help

Turn on the first switch, burns half a minute. Then turn off the first, and turn on the second.
After half a minute, turn off the second switch. then go upstairs and which light bulb is the warmest - belongs to the second switch. Which is slightly cooler - belongs to the first switch, and the last light bulb known to belong to the third switch

I guessed in one min

Quote from: j0hny on September 21, 2014, 04:50 PM

Quote from: DarkOne on September 21, 2014, 02:42 PM
One for you, j0hny.

Downstairs in your house, there are 3 light switches. Each switch turns on a light bulb upstairs.
You can't see the light bulbs from downstairs.

You can only go upstairs once. How do you find out which switch turns on which light bulb? Took me a couple of minutes to figure that one out without help

Turn on the first switch, burns half a minute. Then turn off the first, and turn on the second.
After half a minute, turn off the second switch. then go upstairs and which light bulb is the warmest - belongs to the second switch. Which is slightly cooler - belongs to the first switch, and the last light bulb known to belong to the third switch

I guessed in one min

You don't even need to use all three switches. The bulb from the one you don't use will be off and cold.

Quote from: Rok on September 21, 2014, 07:40 PM

Quote from: j0hny on September 21, 2014, 04:50 PM

Quote from: DarkOne on September 21, 2014, 02:42 PM
One for you, j0hny.

Downstairs in your house, there are 3 light switches. Each switch turns on a light bulb upstairs.
You can't see the light bulbs from downstairs.

You can only go upstairs once. How do you find out which switch turns on which light bulb? Took me a couple of minutes to figure that one out without help

Turn on the first switch, burns half a minute. Then turn off the first, and turn on the second.
After half a minute, turn off the second switch. then go upstairs and which light bulb is the warmest - belongs to the second switch. Which is slightly cooler - belongs to the first switch, and the last light bulb known to belong to the third switch

I guessed in one min

You don't even need to use all three switches. The bulb from the one you don't use will be off and cold.

I didn't write about the third light bulb

You could also just not switch off the second light bulb

DarkOne: to the orchard went two fathers and two sons. Each of them collected 10 apples. How many in total of gathered apples?

20. If there are 2 fathers there, then there are already also 2 sons there.

Quote from: DarkOne on September 22, 2014, 11:13 AM
20. If there are 2 fathers there, then there are already also 2 sons there.

Not really, if go to court grandfather, father and son, so the father is both father and son

Are you sure you wrote that properly johny? I mean, considering the way you've wrote it I can only think of 2 answers, either 40, or 0.

40 - It doesn't seem like a riddle, it just sounds like a straight up question, 4 people, 10 each, so 40...

0 - The ONLY part that I could twist, is "Each of them collected" vs "total of gathered", so that would be collected vs gathered, and as gather could imply actually picking them up from the orchard physically and collected could imply someone else handed them over, only reason why I could say 0...

Apart from that, if I am wrong then it's probably a ridiculously easy answer or something lol.

Quote from: j0hny on September 22, 2014, 12:16 PM

Quote from: DarkOne on September 22, 2014, 11:13 AM
20. If there are 2 fathers there, then there are already also 2 sons there.

Not really, if go to court grandfather, father and son, so the father is both father and son

The grandfather is also someone's son, so in your description, there are 3 sons there.
Either that, or your description is incomplete.

Quote from: DarkOne on September 22, 2014, 02:11 PM

Quote from: j0hny on September 22, 2014, 12:16 PM

Quote from: DarkOne on September 22, 2014, 11:13 AM
20. If there are 2 fathers there, then there are already also 2 sons there.

Not really, if go to court grandfather, father and son, so the father is both father and son

The grandfather is also someone's son, so in your description, there are 3 sons there.
Either that, or your description is incomplete.

it's not my riddle, so it is possible that something is wrong with it