Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

John went to buy some expensive, foreign chocolates. He only had Rs 100 with him. When he reached the shop, he got out and know that on those chocolates, there was a 15% import duty and 5% VAT.

How much worth chocolate should he buy so that he can accommodate it in Rs 100?

What number do you get when you multiply all of the numbers on a telephone's number pad?

How can you make number one disappear by adding something to it?

Consider this about a word: The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

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?

What is the word or phrase?

By what process could you make a 'Tea-Table' into food?

People make me, save me, change me, raise me. What am I?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT