PUZZLE #1
Mr. Smith went to a shop yesterday where he spent half of his money within 30 minutes. After spending his money he had the same amount (number) of cents as he had before in dollars and he possessed half as many dollars as he had before in cents. How much money did he spend?

ANSWER #1 (click to enlarge):

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PUZZLE #2
Mr. McGuire asked a police-officer: "Could you please tell me what time it is?" Officer Clany who was known to like mathematics answered: "If you add 1/4 of the time from midnight up to now to 1/2 of the time from now to midnight you have the exact time. So what time is it?


ANSWER #2 (click to enlarge):

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PUZZLE #3
2, 6, 30, 260, ____

ANSWER #3
N^n+n..
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PUZZLE #4
12, 35, 711, 1317, 1923, 2931, _____

ANSWER #4
Each member contains two sets of prime numbers, consecutively.
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PUZZLE #5
more than one answer. I'm looking for a perfect answer, though (Also a solid answer):
4, 6, 8, 12, ____

ANSWER #5
Number of faces of Platonic solids in the order tetrahedron, cube, octahedron, dodecahedron, icosahedron.
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PUZZLE #6
1, A, 13, 1C, 25, ____


ANSWER #6
The formula is: A+9=B, B+9=C... (only in Hexadecimal which is base 16).
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PUZZLE #7
1, 4, 36, 576, 14400, _________

ANSWER #7
N!^2, N+1!^2...
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PUZZLE #8
0, 1, 1.585, 2, 2.322, 2.585, 2.807, 3, 3.170, 3.322, _____
HINT: A SLIDE RULE WOULD HELP

ANSWER: #8
2 (log n) = 1,2,3,4,etc
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PUZZLE # 9
#:1 :: Matrix : _____

ANSWER: #9
THE IDENTITY MATRIX, WHICH IS EQUAL TO ONE.
A THREE COLUMN IDENTITY MATRIX:
100
010
001
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Hose puzzle:
Large hose rate=1/10 pool per hour
Small hose rate=1/15 pool per hour
Two large + one small rate= 3/30 + 3/30 + 2/30 = 8/30 = 4/15 pool per hour
Time required = 15/4 hours or 3 3/4 hours or 3 hours and 45 minutes.