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

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.

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

We can be boring,Or interesting.
We can be long,Or short.
We can have pictures,Or just words.
Many love us,But many also hate us.
What are we?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

Can you quickly find which two matchstick figures are identical?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?