Can you solve this picture maths equation?

What does the below rebus riddle means?

Why 1729 is a magic number? Answer Logically.

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to a high death toll. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail, which proved deadly. What was it?

Which city is three-fifths chick two third cat and 50% goat?

What is the next number in this series?

4,12,84,3612....

Name a key which is hardest to turn.

One day, I thought of ways that can be used for creating a palindrome. So I decided that I will turn into a larger number by adding the reversed digits to the original number and keep doing it till I finally obtained a palindrome.

I am not sure if this process will always result in a palindrome eventually but I was able to produce a four-digit palindrome. Can you guess my starting number?