Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

When does a USA Potato change its nationality?

Can you replace the question mark with the correct number in the below table sequence?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

A game is being played where eight players can last for thirty-five minutes. Six substitutes alternate with each player in this game. Thus, all players are on the pitch for the same amount of time including the substitutes.

For how long is each player on the pitch?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

How many times can you subtract the number two from the number fifty?

If Bihan is 10, Anirudha is 20, and Kim and Seal are both 5, but Rikold is 10, how much is Kenniger by the same trend?

You see me once in June, twice in November, and not at all in May. What am I?

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