Cristina was born in 1888. She just had her 30th birthday today how did that happen?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

Steffi's daughter Jazelle needs to be picked up from school every day.
Steffi asks one of her colleagues to pick up Jazelle from the school. Steffi devised a password system to confirm that Jazelle goes with the correct colleague only.

The password on Monday was SJM16.
The password on Wednesday was TAW39.

What will the password be for Friday?

Count the Triangle in the figure given below:

I have no life, but I can die. What am I?

Jack and Joseph are well-known golf rivals. One Day during a match, they were level at a score of 30. Jack hit a bad shot and Joseph added 10 to his score. Joseph then hit an awesome shot and he won the game.

How ?

Find the next number in the sequence

5 12 24 36 ?

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

When is the top of a mountain similar to a savings account?

Complete the table series riddle by finding the number that can replace "??".