I have branches, but no fruit, trunk or leaves. What am I?

What does this rebus means ?

PROG WORKRESS

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

If two fifty-foot ropes are suspended from a forty-foot ceiling that is twenty feet apart, how much rope will you be able to steal if you have a knife?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

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

This is a simple one. You just have to count the number of Fs in the given sentence.

Finished Files are the result of years of scientific study combined with the experience of years.

How many did you count?

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?

You are provided with a grid (as shown in the picture). Can you fill the squares with numbers 1-8 in a manner that none of the two consecutive numbers are placed next to each other in any direction (vertically, horizontally or diagonally?)