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0 / 60 seg.
I have 25 coins that are made up of dimes (10¢), nickels (5¢) and pennies (1¢). They add up to a dollar. How many coins of each do I have?
7
D
_
M
_
S
(
1
0
¢
)
,
3
N
_
C
K
_
L
S
(
5
¢
)
_
N
D
1
5
P
_
N
N
_
_
S
(
1
¢
)
W
_
L
L
_
D
D
_
P
T
_
2
5
C
_
_
N
S
_
N
D
$
1
Clue
62.5 GRAMS THE SMALLER BRICK IS NOT ONLY FOUR TIMES SHORTER THAN THE FIRST ONE, BUT IT IS ALSO FOUR TIMES NARROWER AND FOUR TIMES LOWER AND THEREFORE THE RATIO OF THE VOLUME AND WEIGHT IS 4 X 4 X 4 = 64 TIMES. SO 4KG/64 = 62.5 GRAMS
THE DIFFERENCE IN AGE IS STILL 23 YEARS, SO I MUST BE 23 IF MY FATHER IS TWICE AS OLD
$1.19 - 3 QUARTERS (25¢ COINS), 4 DIMES (10¢ COINS), AND 4 PENNIES (1¢ COINS). THERE'S NO WAY TO COME UP WITH A DOLLAR CHANGE WITH 3 QUARTERS, 4 DIMES AND 4 PENNIES
7 DIMES (10¢), 3 NICKELS (5¢) AND 15 PENNIES (1¢) WILL ADD UP TO 25 COINS AND $1
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