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

When can we add 2 to 11 and get 1 as the correct answer?

A car is crossing a 20 km-long bridge. The bridge can support at most 1500kg of weight over it. If somehow, the weight on the bridge becomes more than that, it will break.

Now, the weight of the car is exactly 1500kg. At the midway, a bird comes and sits on the roof of the car. This bird weighs exactly 200 grams.
Can you tell if the bridge breaks at this point or not?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

Find the next number in the series below

21 32 54 87 131 ?

One fine day, an intellectual man came to the emperor's court with the aim of testing Birbal's wittiness. In order to do this, he challenged Birbal to answer his question and hence prove that he was as intelligent and witty as he was said to be.
He asked Birbal, Do you want me to ask one difficult question or a hundred easy ones?
Since both Akbar and Birbal had had a tough day and were eager to leave, Birbal hastily told the intellectual to ask him a single difficult question.
Intellectual: OK. Tell me what came first into the world, the egg or the chicken?
Of course, the chicken, Birbal replied with a smile.
This time with a note of victory in his voice, the intellectual asked Birbal, How will you demonstrate that?
What did Birbal say?

Which is the smallest number that you can write using all the vowels exactly once?

Can you find out the total number of triangles in the given figure?