There are no tricks, this is a straight forward problem.
Allegedly, this is one of the questions for potential Microsoft employees. I must warn you, you can really get caught up trying to solve this problem. Reportedly, one guy solved it by writing a C program, although that took him 37 minutes to develop (compiled and ran on the 1st try though). Another guy solved it in three minutes. A group of 50, at Motorola, couldn't figure it out at all. See how long it takes you.

Here we go...

"U2" has a concert that starts in 17 minutes and they must all cross a bridge to get there. All four men begin on the same side of the bridge. You must help them across to the other side. It is night. There is one flashlight. A maximum of two people can cross at one time. Any party who crosses, either 1 or 2 people, must have the flashlight with them.

The flashlight must be walked back and forth, it cannot be thrown, etc.
Each band member walks at a different speed. A pair must walk together at the rate of the slower man's pace:

* Bono: - 1 minute to cross
* Edge: - 2 minutes to cross
* Adam: - 5 minutes to cross
* Larry: - 10 minutes to cross

For example: if Bono and Larry walk across first, 10 minutes have elapsed when they get to the other side of the bridge. If Larry then returns with the flashlight, a total of 20 minutes have passed and you have failed the mission.


Notes: There is no trick behind this. It is the simple movement of resources in the appropriate order. There are two known answers to this problem. This is based on a question that Microsoft gives to all prospective employees.

Note: Microsoft expects you to answer this question in under 5 minutes!

Bono and Edge go first over the bridge then Bono comes back = 3 minutes
Larry and Adam go secondly over the bridge then Edge comes back = 12 minutes
Bono and Edge then come back = 2 minutes

Copy paste queation ka Copy paste answer

Solution 1
Bono and the Edge walk accross (2 minutes)

Bono walks back (3 minutes)

Larry and Adam walk accross (13 minutes)

The Edge walks back (15 minutes)

Bono and the Edge walk accross (17 minutes)

Solution 2

Bono and the Edge walk accross (2 minutes)

The Edge walks back (4 minutes)

Larry and Adam walk accross (14 minutes)

Bono walks back (15 minutes)

Bono and the Edge walk accross (17 minutes

U mean k DA nay bhi copy paste kia hay???

aur nahi to kiya
aur yea bhi likha hoa hay kay "There are two known answers to this problem."

maine to khudi calculation karke solve kia hai.. dusra answer mujhe nai aata tha

hamzaad brother zara aa ker humain batayen k kis ko winner mana jaye

jisnay pehlay answer dia hay usi ko winner qarar deingay............kion k dono nay hi sahi answer dia hay.............

so i think DA is winner..............

bhalay say usnay copy paste kia ho

Jo hukam

maine copy paste nai kiyaaaaaaaaaaaaaaaaaaaaaaa

main ab riddles nai khailoongi

gussa nahi sabi

bhai ap side pe hojao inhone me ko cheater kaha hai ab main koi riddle solve nai karongi.. siwaye picture puzzles ke ...khudi karein ab yeh solve...

acha theek aisa karo hamzaad bro ki riddle na solve karna meri to kar do kal ki post ki hoi hai kisi se solve hi nahi hoi

Otay

DA aur ghussa
cool down bachi

OYE.......MERI PALI PALI SHWEET SI SISO NARAZ HOGAI.............ME JUST JOKING YAR............WESAY BHI MIENAY TOU KUCH BHI NAHI KAHA........YE TOU SAB DOSHIZA NAY KAHA THA AISA

me ko bhi gushaaa aata hai

but u ne bhi accept kiya naaaaa

ghussay ko DA say duur rehna chahiyay na

baat tou accept karnay wali thi naa

to bas nai kar rahi main koi riddle solve

kabhi kabhi aajata hia ghusshaaaa

us ko ghussa dikha kar bhaga diya karo

puzzle solve karnay ko kon mana kar raha hay ??? sirf copy past

maine koi copy paste nai kia tha nai kia tha nai kia thaaaaaaaaaaaaa

phir ghussa

ghussay ko ghussa dikha kar bhaga do

there is flash game based on this puzzle .. and it took me about 1 min to figure out and then solve it .. i din know that it was asked here as well ...


any way .. Cool Answer D.A