Decode this picture on T-Shirt and tell what it says ?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

Replace the question mark with the correct number.

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

Do you know who was buried in John's tomb?

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

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

What do you call a fish without an eye?

Mr Black, Mr Gray, and Mr White are fighting in a truel. They each get a gun and take turns shooting at each other until only one person is left. Mr Black, who hits his shot 1/3 of the time, gets to shoot first. Mr Gray, who hits his shot 2/3 of the time, gets to shoot next, assuming he is still alive. Mr White, who hits his shot all the time, shoots next, assuming he is also alive. The cycle repeats. If you are Mr Black, where should you shoot first for the highest chance of survival?