Can you solve below mathematical equation?

2^1234 - 2^1233

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?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

No matter how little or how much you use me, you change me every month. What am I?

Open a Laptop which is password protected. Hint for the password is given as below:

1 mobile 3 books 2 Boards 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

The owner of a popular clothing store comes up with his own method of pricing items. A vest costs $8, socks cost $10, a tie costs $6, and a blouse costs $12. Using the owner’s method, how much would a pair of underwear cost?

Why 1729 is a magic number? Answer Logically.

You can hear me, but you can't touch or see me.

What am I?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?