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[hincyprus]

You have 10 trees and you have to plant them in five rows but each row must contain 4 trees. How is this possible?

H[/b]

[hincyprus]

Four members of a band are walking to a night concert. They decide to take a shortcut, but must cross a bridge. Luckily they have one flashlight. Because of the varying size of their instruments, it takes each member a different amount of time to cross the bridge - it takes the first person one minute, the second person two minutes, the third person five minutes and the fourth person ten minutes. They must cross the bridge in pairs, travelling at the slower speed so if the one minute person went with the ten minute person, it would take a total of ten minutes. Since there is only one flashlight, one person must come back across the bridge, then another pair can cross. They only have 17 minutes to cross the bridge and still get to the concert on time. What order should they cross to get everyone across and get to the concert?



H

[city]

hincyprus wrote: Four members of a band are walking to a night concert. They decide to take a shortcut, but must cross a bridge. Luckily they have one flashlight. Because of the varying size of their instruments, it takes each member a different amount of time to cross the bridge - it takes the first person one minute, the second person two minutes, the third person five minutes and the fourth person ten minutes. They must cross the bridge in pairs, travelling at the slower speed so if the one minute person went with the ten minute person, it would take a total of ten minutes. Since there is only one flashlight, one person must come back across the bridge, then another pair can cross. They only have 17 minutes to cross the bridge and still get to the concert on time. What order should they cross to get everyone across and get to the concert?

H

Isn't that missing the info how long that one person always need to go back?

[hincyprus]

Isn't that missing the info how long that one person always need to go back?[/quote]


The person or persons who may or may not have to go back have to do this in the overall time allowed

H

[Crash Test Dummy]

hincyprus wrote: You have 10 trees and you have to plant them in five rows but each row must contain 4 trees. How is this possible?

H[/b]


look from the other side then a row will have 4???

[hincyprus]

look from the other side then a row will have 4???[/quote]


No. To give you a clue the trees are laid out in a geometrical type of pattern.........but what?

H

[city]

hincyprus wrote: Four members of a band are walking to a night concert. They decide to take a shortcut, but must cross a bridge. Luckily they have one flashlight. Because of the varying size of their instruments, it takes each member a different amount of time to cross the bridge - it takes the first person one minute, the second person two minutes, the third person five minutes and the fourth person ten minutes. They must cross the bridge in pairs, travelling at the slower speed so if the one minute person went with the ten minute person, it would take a total of ten minutes. Since there is only one flashlight, one person must come back across the bridge, then another pair can cross. They only have 17 minutes to cross the bridge and still get to the concert on time. What order should they cross to get everyone across and get to the concert?

H

ok, I try:

1) 4.person+3.person go = 10 min
2) 1 min for one of them to go back, leaving his instrument with the guy on the other side =1 min
3) the one without instrument crosses the bridge with the 2.person = 2 min
4) one returns without any instrument = 1 min
5) he picks up the one with the last instrument and they cross = 1 min

total 15 min.
2 minutes left to get to the venue

:?:

[Saint Jimmy]

hincyprus wrote: No. To give you a clue the trees are laid out in a geometrical type of pattern.........but what?

9 trees form an equilateral triangle, with the 10th tree in the middle.

[hincyprus]

Saint Jimmy wrote: hincyprus wrote: No. To give you a clue the trees are laid out in a geometrical type of pattern.........but what?

9 trees form an equilateral triangle, with the 10th tree in the middle.



SJ,

It does say in 5 rows.........so sorry no.

Try again.

Another clue.............Israel

[hincyprus]

ok, I try:

1) 4.person+3.person go = 10 min
2) 1 min for one of them to go back, leaving his instrument with the guy on the other side =1 min
3) the one without instrument crosses the bridge with the 2.person = 2 min
4) one returns without any instrument = 1 min
5) he picks up the one with the last instrument and they cross = 1 min

total 15 min.
2 minutes left to get to the venue

:?:[/quote]


good attempt at bending the rules but try again.

If anyone gets bored, let me know and I will put the answers up

H

[petethegreek]

hincyprus wrote: Saint Jimmy wrote: hincyprus wrote: No. To give you a clue the trees are laid out in a geometrical type of pattern.........but what?

9 trees form an equilateral triangle, with the 10th tree in the middle.



SJ,

It does say in 5 rows.........so sorry no.

Try again.

Another clue.............Israel

Trees arranged in the shape of the Star of David. (?)

[hincyprus]

pete the greek


Absolutely correct. If you place the trees at the stars apex's and on the cross points you will find that it works.....

well done

Clever .......

H

[city]

hincyprus wrote:

good attempt at bending the rules but try again.



whats wrong? where did I bend the rules??

btw, the "israel"-clue was far to much! :-)

[hincyprus]

city wrote: hincyprus wrote:

good attempt at bending the rules but try again.



whats wrong? where did I bend the rules??

btw, the "israel"-clue was far to much! :-)




Whoever goes back must take the same time as going across for the first time....IE. If it takes one person 10 minutes he obviously cannot go back and forth etc.

thats a clue but not as big as the Israelis...........

I was joking about bending the rules but it referred to no time taken to go back...............instead of some time.


you can do this............

H

[city]

erm, I counted 1 min each to go back or are you telling me they are carrying their instruments back and forth instead of leaving them on the other side once they are there?? :shock: