It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

You need to arrange three 7 and mathematical symbols to form number 1?

Can you solve the maths in the below-given picture equation?

Can you make four (4) nines (9) equal 100?

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

Who can jump higher than a Mountain?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not rounded numerals equals 24.

A person was killed at a house party. When the police arrive, there are six people present in the house who are the friends of the victim. The name of the friends is Rohit, Aman, Nick, Gagan, and Randy.

Near the dead body, they find a few numbers written with blood by the victim on the floor. The numbers are 8, 5, 4, and 11.

The police arrests one of the friends for the murder. Whom did they arrest and why?