If two's company, and three's a crowd, then whats four and five ?

Can you count the number of matches in the picture below ?

In a basket of apples,
when counted in twos, there was one extra
when counted in threes, there were two extra when counted in fours, there were three extra
when counted in fives, there were four extra
when counted in sixes, there was five extra.

However, if the apples were counted in sevens, no extra apple was left. Can you calculate the minimum number of apples that were present in the basket?

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

O_er_t_o_

Complete the missing letters of the given word.

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

Different lights make me strange by changing me into different sizes. What am I?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

Why is the Hole below a Lock?