John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

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

There is something which is always coming but never arrives?

Two prisoners Jack and Jill are locked in a cell.
There is open window approx 40 feet above the ground of the cell.
They are never able to reach there.

Then they plan to escape by a tunnel and they start digging out.
After digging for more than 20 days, Jill comes with the different plan and they escaped.

what was the plan ?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

Solve below popular number sequence
314 159 265 358 979 323 846 ?

It is an eleven letter word.
The first, second, third and fourth letters form a banquet's name.
The fifth, sixth and seventh letters form a car's name.
The eighth, ninth, tenth and eleventh letters form a mode of transport.

Can you identify what word it is?

Find the missing number in the image below.

What four weights can be used to balance from 1 to 30 pounds?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?