Also, Sunlight.

Car 1 goes into road B, as 136/17 = 8 ;
Car 2 goes into road C, as 567/81 = 7 ;
Car 3 goes into road A, as 243/27 = 9 ;

567 & 243 are not exactly divisible by 17.

Letter ‘L’

Consider first A & B cross the bridge. A returns with the torch.
Time taken is 2 + 1 = 3 minutes

Then C & D cross the bridge. However, B returns with the torch.
Time taken is 8 + 2 = 10 minutes.

Now, both A & B cross the bridge.
Time taken is 2 minutes.

Total time taken: 3 + 10 + 2 = 15 minutes.

Start both the timers viz. 7min & 11 min.

When 7min timer completes, just reverse it so that it starts again..

When 11min completes, just reverse the 7min timer again (4 min would have lapsed = 11 – 7)

Wait for 7min timer to complete; it will take 4 min… totalling 11 + 4 = 15 minutes!

If M is the number of Men, then we have

C = 2M
W=2C

Putting the above into equation, M + C + W = 35

M + 2M + 4M = 35.

Hence , Men = 5, Children = 10, Women = 20

8 men & 14 horses

M + H = 22
2M + 4H = 72 ( man has 2 legs, horse has 4 legs)

Solving the above gives solution as 8 men, 14 horses.

Let weight be x KG.

x=50/(x/2)

or x^2=50*2=100

Hence, x =10 KG

For understanding this issue, lets consider 2 sides –> A & B.  All are on side A.

First farmer takes chicken with him to side B.
Then he takes fox to side B
While returning to side A, he takes chicken with him (to side A)
Then he takes grain to side B
Finally, he takes the chicken to side B.

SEE O DOUBLE YOU!!!