What goes up but never comes down?

who is silent in the parliament?

What word begins and ends with an E, but has only one letter?

In a school, 280 students studied chemistry, 254 students studied physics and 280 students studied biology.

97 students studied chemistry as well as physics, 138 students studied physics as well as biology and 152 students studied chemistry as well as biology.

73 students studied all the three branches.

Can you find out the total number of students?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

A lion and its tamer are standing inside a cage that measures 1 unit in radius. Both of them can effortlessly run at the speed of 1 unit maximum.

1) Suppose the lion is hungry, will he be able to eat up the tamer?
2) If yes, how long can the tamer survive?

What is black when you buy it, red when you use it, and gray when you throw it away?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

By what process could you make a 'Tea-Table' into food?