What goes up but never comes down?

What number should come in place of the question mark below?

What is the largest number you can write with just 3 digits?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

You order chicken wings at KFC in the boxes of 6, 9 and 20. What is the largest number of wings that you cannot obtain by buying in any combination of the boxes?

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

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?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

In the given picture, in how many ways can you read the word "Tiger"?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?