Riddles
Go to...
Index
Translations
Pronunciation
Images
Computers
Geography
Languages
0 / 60 seg.
Double it and multiply it by 4. Then divide it by 8 and you'll have it once more. What number is it?
A
N
Y
N
_
M
B
_
R
.
I
F
_
N
_
M
B
_
R
_
S
D
_
_
B
L
_
D
_
N
D
M
_
L
T
_
P
L
_
_
D
B
Y
4
,
_
T
'
S
_
C
T
_
_
L
L
Y
B
_
_
N
M
_
L
T
_
P
L
_
_
D
B
Y
8
,
S
_
D
_
V
_
D
_
N
G
B
Y
8
W
_
L
L
G
_
T
Y
_
_
T
H
_
_
R
_
G
_
N
_
L
N
_
M
B
_
R
_
G
_
_
N
Clue
USE 4 HALF FILLED BARRELS TO FILL 2 EMPTY BARRELS. WE ARE THEN LEFT WITH 9 FULLY FILLED BARRELS, 3 HALF FILLED BARRELS AND 9 EMPTY BARRELS. EACH SON GETS 3 FULL BARRELS, 1 HALF-FULL BARREL, AND 3 EMPTY BARRELS
ONLY ONCE. THIS IS BECAUSE WHEN YOU SUBTRACT 5 FROM 25 FOR THE FIRST TIME, IT BECOMES NUMBER 20, THEN 15 AND SO ON
27 STUDENTS. THE NUMBER OF BOYS MUST BE A MULTIPLES OF 3 (3, 6, 9, 12, ...) SO THAT IT CAN BE SPLIT IN THE RATIO OF 2:1 (NO WATCH:WATCH). THE NUMBER OF GIRLS IS DOUBLE THE NUMBER OF BOYS - 6, 12, 18, 24, ETC. SO THE TOTAL NUMBER OF STUDENTS CAN ONLY BE 9, 18, 27, 36, ETC
ANY NUMBER. IF A NUMBER IS DOUBLED AND MULTIPLIED BY 4, IT'S ACTUALLY BEEN MULTIPLIED BY 8, SO DIVIDING BY 8 WILL GET YOU THE ORIGINAL NUMBER AGAIN
Text
Audio
Text & audio
Free text
Multiple option
Previous question
Start
Next question
Please enable JavaScript to continue using this application.