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

Can you find the 09 errors in the picture below?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

When it is alive we sing, when it is dead we clap our hands. What is it?

I am a word of 12 alphabets.

* Alphabets 12, 4, 7, 2, 5 : Eastern beast of burden
* Alphabets 1, 8, 10, 9 are street made famous by Sinclair Lewis.
* Alphabets 11, 3, 6 are past.

On whole it means a person suffering from delusions of greatness.

What Is it ?

I’m tall when I’m young, and I’m short when I’m old. What am I?

What makes this number unique: 8,549,176,320?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

There are forty elephants and they have forty-fore heads. How can this be possible?

What Deficiency does the below rebus represent?

VIT_MIN