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

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

What begins with T, ends with T, and has T in it?

Which is heavier: a ton of bricks or a ton of feathers?

A mother bought three dress for her triplets daughters(one for each) and put the dresses in the dark. One by one the girls come and pick a dress.
What is the probability that no girl will choose her own dress?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

Look at the picture and find out which square is not linked with any of the other squares.

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

Out of four images which one is the odd one out?

Jack have ten pairs of black socks, eight pairs of white socks and seven pairs of green socks. Everything is mixed in a draw. As there is no light he were not able to identify the colour of the socks. How many of the socks did he want to take to match one pair