The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

In my garden, I have many trees but only one of them is the mango tree. In these mango trees, there are some mangoes(as expected).

But after a strong wind, there are neither mangoes on the tree nor on the ground. Explain?

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.

Count the Triangle in the figure given below:

What famous saying does this rebus mean?

COME SERVED <---
COME SERVED
COME SERVED
COME SERVED
COME SERVED

What does this say?

XLR8

Can you Find and name the hidden bird in the picture below ?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

You are stuck on an island where you have nothing. You find four pieces of paper somewhere on the island. What will be your strategy to escape from the island safely?

PS: No other resource is available to you on the island, neither can you build anything.