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

How can a man go eight days without sleep?

Can you count the number of quadrilaterals in the picture below?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

What you cannot hold but it is yours?

What is the next number in the series?

15 29 56 108 208 ?

Can you count the number of triangles in the given picture?

There are three boxes of different sizes with three cupcakes inside each of the boxes in Christina's kitchen. At night her daughter wakes up and goes to the kitchen. She opens a box and eats all three cakes.

But in the morning Christina finds out that each box still had three cupcakes. How?

Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.