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0 / 60 seg.
Can you place 10 coins in 3 cups so that each cup contains an odd number of coins?
L
_
T
'
S
N
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M
_
T
H
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C
_
P
S
A
,
B
_
N
D
C
.
P
L
_
C
_
3
C
_
_
N
S
_
N
C
_
P
A
_
N
D
2
C
_
_
N
S
_
N
C
_
P
B
.
P
L
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C
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C
_
P
A
_
N
C
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P
B
,
N
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W
C
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P
B
C
_
N
T
_
_
N
S
5
C
_
_
N
S
.
P
L
_
C
_
R
_
M
_
_
N
_
N
G
5
C
_
_
N
S
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N
C
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P
C
Clue
NO MATTER IN WHICH POSITION THE CUP IS, ITS HANDLE WILL ALWAYS BE ON THE OUTSIDE
MAKE 2 PILES WITH EQUAL NUMBER OF COINS. NOW, FLIP ALL THE COINS IN ONE OF THE PILE. HOW THIS WILL WORK? LET'S TAKE A LOOK AT AN EXAMPLE. SO INITIALLY THERE ARE 5 HEADS, SO SUPPOSE YOU DIVIDE IT IN 2 PILES. P1 : H H T T T P2 : H H H T T NOW WHEN PILE P1 IS FLIPPED: P1 : T T H H H THE NUMBER OF HEADS IN P1 AND P2 ARE EQUAL NOW
YOU WILL NEED 4 COINS. PLACE THREE COINS FLAT ON THE TABLE IN A TRIANGLE (TOUCHING EACH OTHER) AND PUT THE FOURTH ONE ON TOP OF THEM IN THE MIDDLE
LET'S NAME THE CUPS A, B AND C. PLACE 3 COINS IN CUP A AND 2 COINS IN CUP B. PLACE CUP A IN CUP B, NOW CUP B CONTAINS 5 COINS. PLACE REMAINING 5 COINS IN CUP C
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