Can you convert the number zero(0) into a positive number using just one mathematical operator ?

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

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

How can you leave a room with two legs and return with six legs?

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

Three playing cards in a row. Can you name them with these clues? There is a two to the right of a king. A diamond will be found to the left of a spade. An ace is to the left of a heart. A heart is to the left of a spade. Now, identify all three cards.

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

Can you find the dog hidden in a group of pandas?