What kind of storm is always in a rush?

I am the largest in my family of fifty.
The youngest of our family lives separately from the rest of the family and so do I.
I am regarded as harsh and tough.
I am so large, you cut me in two equal halves,
each half would still be larger than the second largest member of the family.
Who am I?

What's a single-digit number with no value?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

If,

20 % 5 = 24

21 % 7 = 33

42 % 6 = 67

Then;

66 % 6 = ?

What jumps when it walks and sits when it stands?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

What has many keys but can’t open a single lock?

If a wheel has 54 spokes, how many spaces are there between the spokes?