Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

John has played 50 ODI's and his average is 50. How many runs should he score in his 51st ODI, so that his average score jumps to 51?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

If two's company, and three's a crowd, then whats four and five ?

Nodes are shown below and you need to connect them based on the following rule: Every node can be connected to the number of nodes inside them, i.e. the first node there is a value of 1 which indicates that the first node can connect to exactly one node only.Can you do it?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

Can you solve below mathematical equation?

2^1234 - 2^1233

Find the missing number in the sequence below:

Andrew sees a very rare bird named "Ruppell's vulture". Soon Andrew was dead. Can you explain the mystery, Mr. Sherlock?

He digs out tiny caves and stores gold and silver in them. He also built bridges of silver and made crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs his help, yet many people are afraid to let him help them. Who is he?