When we see 2 but call 10?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

A Club organizes a Running Race, and John, Jacob, Minda, and Tony participated.

The results are as follows

John beats Jacob
Minda beats Toni
Toni beats John

Who came first in the race?

Solve the following series:
AZ, GT, MN, __, YB

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

There is one four-digit whole number n, such that the last four digits of n2 are the original number n

He loves to dance, twist and prance, he shakes his tail, and as a way he sails, wingless he flies into the sky. What is he?

Can you solve the maths in the below-given picture equation?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

On rolling two dices (six-sided normal dice) together, what is the probability that the first one comes up with a 2 and the second one comes up with a 5?