I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

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

Jenifer and Jesica are having a conversation.

Jenifer: I am definitely not over 30.
Jesica: I am 28 and you are surely 5 years older to me at least.
Jenifer: No, you are at least 29.

You are told that both of them are lying throughout in the conversation. Can you find their respective ages?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

Which is the rope you never skip with?

John has eleven friends. He has a bowl containing eleven apples. Now He wants to divide the eleven apples among his friends, in such a way that an apple should remain in his bowl.
How can He do it?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

What is the next number in the series?

15 29 56 108 208 ?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.