Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

What is the next number in the series?

15 29 56 108 208 ?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

If eleven plus two equals one, what does nine plus five equal?

It is an eleven letter word.
The first, second, third and fourth letters form a banquet's name.
The fifth, sixth and seventh letters form a car's name.
The eighth, ninth, tenth and eleventh letters form a mode of transport.

Can you identify what word it is?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

Before the start of the car race, John and Jacob have the same amount of fuel in their car. With this fuel, John can drive for 4 hours while Jacob can drive five hours.
After a time they realize that the amount of fuel left in John's car is 1/4th of the fuel in Jacob's.

For how long they are racing?

A Club organizes a Running Race, and John, Jacob, Minda, and Tony participated.

The results are as follows

John beats Jacob
Minda beats Toni
Toni beats John

Who came first in the race?

What goes through cities and fields, but never moves?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?