Can it be possible to build a house that has all its four walls facing towards the South?

What does below chemistry rebus means?

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

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

Name a key which is hardest to turn.

Find the 8 in the below-given Image.

Which number should replace the question mark?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

Imagine a box with two cogwheels, one big with 24 teeth and one small with 8 teeth. The big one is firmly attached to the center of the box which means it does not turn or move while the small one rotates around the big one.

How many times do you think that the smaller wheel will turn compared to the box when it turns once around the big one?