I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

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?

What you cannot hold but it is yours?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

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

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

How can you take 2 from 5 and leave 4?