If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

What can you catch but never throw?

In a contest, four fruits (an apple, a banana, an orange, and a pear) have been placed in four closed boxes (one fruit per box). People may guess which fruit is in which box. 123 people participate in the contest. When the boxes are opened, it turns out that 43 people have guessed none of the fruits correctly, 39 people have guessed one fruit correctly, and 31 people have guessed two fruits correctly.
How many people have guessed three fruits correctly, and how many people have guessed four fruits correctly

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?

A bomb exploded in a room full of married couples and no one died. How?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?