Riddles
Go to...
Index
Translations
Pronunciation
Images
Computers
Geography
Languages
0 / 60 seg.
There was a small get-together. There were a total of 28 handshakes exchanged between the guests. How many guests were present?
T
H
_
R
_
W
_
R
_
8
G
_
_
S
T
S
.
I
F
T
H
_
R
_
_
R
_
2
G
_
_
S
T
S
,
T
H
_
R
_
W
_
L
L
B
_
1
H
_
N
D
S
H
_
K
_
.
S
_
,
2
G
_
_
S
T
S
,
1
H
_
N
D
S
H
_
K
_
3
G
_
_
S
T
S
,
2
H
_
N
D
S
H
_
K
_
S
3
G
_
_
S
T
S
,
3
H
_
N
D
S
H
_
K
_
S
4
G
_
_
S
T
S
,
6
H
_
N
D
S
H
_
K
_
S
W
_
T
H
T
H
_
S
,
F
_
R
N
G
_
_
S
T
S
,
W
_
W
_
L
L
H
_
V
_
(
N
(
N
-
1
)
)
/
2
H
_
N
D
S
H
_
K
_
S
Clue
THREE. THEY'RE ALL IN A ROW, DUCK 1, DUCK 2 FOLLOWED BY DUCK 3. SO DUCKS 1 AND 2 ARE IN FRONT OF DUCK 3, DUCKS 2 AND 3 ARE BEHIND DUCK 1 AND DUCK 2 IS IN THE MIDDLE
THERE WERE 8 GUESTS. IF THERE ARE 2 GUESTS, THERE WILL BE 1 HANDSHAKE. SO, 2 GUESTS, 1 HANDSHAKE 3 GUESTS, 2 HANDSHAKES 3 GUESTS, 3 HANDSHAKES 4 GUESTS, 6 HANDSHAKES WITH THIS, FOR N GUESTS, WE WILL HAVE (N(N-1))/2 HANDSHAKES
9 TEENAGERS CAN EAT 18 PIZZAS IN 3 DAYS. 1 TEENAGER CAN EAT 1 PIZZA IN 1.5 DAYS. 1 TEENAGER CAN EAT 2 PIZZAS IN 3 DAYS. 9 TEENAGERS CAN EAT 18 PIZZAS IN 3 DAYS
THE NEXT NUMBER IN THE SEQUENCE IS 1113213211. EACH NUMBER DESCRIBES THE PREVIOUS NUMBER. STARTING WITH 1, THE SECOND NUMBER DESCRIBES IT AS 11 (ONE 1). THEN THE THIRD NUMBER DESCRIBES 11 AS 21 (TWO 1'S). THEN THE FOURTH NUMBER DESCRIBES 21 AS 1211 (ONE 2, ONE 1). TO DESCRIBE 13112221, IT HAS TO BE 1113213211 (ONE 1, ONE 3, TWO 1, THREE 2, ONE 1). IN MATHEMATICS, THIS IS CALLED THE LOOK-AND-SAY SEQUENCE
Text
Audio
Text & audio
Free text
Multiple option
Previous question
Start
Next question
Please enable JavaScript to continue using this application.