Can you place six X (crosses) in below board without making three in a row in any way ?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

Can you find the key in the picture below?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

My sock drawer has 26 blue socks, 13 pink socks, 33 green socks, and 12 red socks, how many socks would I have to pull out in the dark to be sure I had a matching pair?

what does the below math rebus puzzle mean?

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

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

Why do Chinese men eat more rice than Japanese men do ?