T H _ Y
W _ L L
N _ V _ R
S T _ P
_ _ T
W _ T H
R _ G H T
F _ _ T
T _ G _ T H _ R .
F _ R
_ V _ R Y
T H R _ _
S T _ P S ,
T H _ Y
W _ L L
B _ T H
S T _ P
_ _ T
T _ G _ T H _ R .
B _ T
T H _
S _ Q _ _ N C _
W _ L L
B _
( S H _ R T
M _ N - T _ L L
M _ N )
L _ F T - L _ F T ,
R _ G H T - L _ F T ,
L _ F T - L _ F T ,
R _ G H T - L _ F T
_ N D
S _
_ N Clue
LET: CAMPER 1 = C1 (1) CAMPER 2 = C2 (2) CAMPER 3 = C3 (5) CAMPER 4 = C4 (10) THIS IS HOW THEY CROSS THE BRIDGE: C1,C2 → (2) ← C2 (2) C3,C4 → (10) ← C1 (1) C1,C2 → (2) THE TIME IN BRACKETS () INDICATE THE TIME TAKEN TO CROSS THE BRIDGE. IF YOU SUM THEM UP, IT WILL ADD UP TO 17 MINUTES YES. HE TOOK AS MUCH TIME FOR THE SECOND HALF OF HIS TRIP AS THE WHOLE TRIP WOULD HAVE TAKEN ON FOOT. SO NO MATTER HOW FAST THE TRAIN WAS, HE LOST EXACTLY AS MUCH TIME AS HE SPENT ON THE TRAIN. HE WOULD HAVE SAVED 1⁄30 OF THE TIME BY WALKING ALL THE WAY THERE ARE 49 STEPS. HE CLIMBS HALFWAY, WHICH IS STEP 25. HE HEARS THE BIRD SINGING ON STEP 33. HE PICKS UP THE PEBBLE ON THE 21ST STEP AND TOSSES IT ON THE 22ND STEP. THE REMAINING 27 STEPS ARE TAKEN THREE AT A TIME WHICH IS 9 PACES (3 STEPS X 9 PACES = 27 STEPS) THEY WILL NEVER STEP OUT WITH RIGHT FEET TOGETHER. FOR EVERY THREE STEPS, THEY WILL BOTH STEP OUT TOGETHER. BUT THE SEQUENCE WILL BE (SHORT MAN-TALL MAN) LEFT-LEFT, RIGHT-LEFT, LEFT-LEFT, RIGHT-LEFT AND SO ON