What happened when the wheel was invented?

Find the last number in the series below:

voN luJ yaM raM ---

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

John buys rice at Rs.60/kg from Britain and then sells them at Rs.5/kg in India. As a result of this, he becomes a millionaire. How come?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

Pronounced as 1 letter, And written with 3, 2 letters there are, and 2 only in me. I’m double, I’m single, I’m black blue and grey, I’m read from both ends, and the same either way. What am I?

Rearrange the letters in "new door" to make one word.

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?