What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

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?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

What Time Should the last watch show in the below figure?

You have 10 balls with you. A friend of yours out of nowhere asks you to place those ten balls in five lines such that each of the lines has exactly 4 balls on them. He needs to check your intelligence. Prove him by doing the task.

What does the below rebus puzzle mean?

What is the longest word in the dictionary?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?