Before Mount Everest was discovered, what was the highest mountain in the world?

What building has the most stories?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

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?

What is next number in the pattern below:

131 517 192 123 ?

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

What is the next shape from answers A, B, C, and D figure?

What word does this rebus represent?

meta meta
meta meta

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?