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Friday Riddle

nudgie
nudgie CSN Member Posts: 1,478 Member
edited March 2014 in Colorectal Cancer #1
Remember NO GOOLGING or SEARCHING the Internet allowed and good luck !!!!!!!!!!!!!

RIDDLE: You have 10 trees and you have to plant them in five rows but each row must contain 4 trees. How is this possible?
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  • PGLGreg
    PGLGreg CSN Member Posts: 731
    #2
    Rows are on great circles.
    Row 1 is 4 trees planted around the equator, equally spaced, at longitude 0, 90, 180, and 270 degrees.
    Row 2 is 2 more trees planted at each pole, together with the first and third of the trees on the equator.
    Row 3 is the 2 trees planted at the poles, together with the second and fourth of the trees on the equator.
    6 trees have been planted. The other 4 trees are planted around the tropic of Capricorn, equally spaced at 45, 135, 225, and 315 degrees.
    Row 4 is the 2 trees planted at the poles, together with the first and third of the trees on the tropic of Capricorn.
    Row 5 is the 2 trees planted at the poles, together with the second and fourth of the trees on the tropic of Capricorn.

    Some trees may need to be planted under water.

    --Greg
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