You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

Which digit occurred maximum times between the number 1 and 1000?

Jim and Sarah are in a long-distance relationship. Jim buys an engagement ring for Sarah and wants to mail it to her. Unfortunately, the only way to ensure the ring will be received is to place a lock on the package. Jim has locks and Sarah has locks, but neither has keys for each other’s locks. How can they make sure the ring isn’t stolen?

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

There are two dice with empty faces in front of you and a marker. You can mark any number on each of the faces of the two dice, but you have to display all 31 days of the month using the two of them.

Which numbers will you mark on which dice so that you can easily depict all the dates of the month?

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

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?