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

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

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

Below, you can see some coding:
January = 1017
February = 628
March = 1335
April = 145
May = 1353
June = 1064
July = 1074
August = 186

Now deciphering the way it has been coded, can you find out how September will be coded?

If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Buy me, smell me or deliver me, I do not change.

Who am I?

Count the squares in the matchstick puzzle below?