There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

What does a man do only once in his lifetime, but women do once a year after they are 29?

There are three cows, two dogs, and one cat: How many legs do you have?

Christina is older than Kareena and Karishma. Katrina is older than Karishma and younger than Kareena. If Kareena has a brother named John, who is older than Christina, who's the youngest?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

Spot 5 differences in two Christmas tree below:

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

What does does this rebus picture means ?

John, Jack and Jill are in a desert. John doesn't like Jill and hence decides to murder him. He poisons the water supply of Jill. Since it is a desert area, Jill must drink or he will die of thirst.

Jack does not know of the actions of John and also decides to murder Jill. To succeed in his ill motives, he removes the water supply of Jill so he dies of thirst.

Jill dies due to thirst. Who murdered Jill?