why number 8549176320 is one of a kind?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

what does the below rebus mean?

Chhote se Chintu Miyan,
Lambi si Pooch.
Jahan Jaye Chintu Miyan,
Wahan Jaye Pooch.

छोटे से चींटू मियाँ,
लंबी सी पूंछ।
जहाँ जाये चींटू मियाँ,
वहाँ जाये पूंछ।

Bolo kya?

Using Only Five 5's and any mathematical operator make sum as 37

Two boys wish to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both boys manage to cross using the boat.

How?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).