Solution:

All numbers(0-9) appears in alphabetical order and once.

Solution:

They can be expressed as the sum of the cubes of two different sets of numbers.

10^3 + 9^3 = 1729
and
12^3 + 1^3 = 1729

Solution:

Typewriter

Solution:

Belgium, Chile, Fiji, Egypt

Solution:

Forty

Solution:

125874 => 251748

251748 is twice the 125874 and have same digits 1,2,4,5,7 & 8

Solution:

2024

Seven occurrence
24-01-24
12-02-24
08-03-24
06-04-24
04-06-24
03-08-24
02-12-24

Solution:

44

In 12 hours, the minute and hour hands overlaps or are in exact opposite direction 22 times.
=> In 24 hours, the hands overlaps or are in opposite direction 44 times

Solution:

PACK MY BOX WITH FIVE DOZEN LIQUOR JUGS.

Solution:

The doors at 'The Coconut Grove' opened inward. In the mad panic to escape the fire, people were crushed against the doors and could not pull them open. After 'The Coconut Grove' disaster in 1942, all public buildings had to have doors which opened outward.