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

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

A mules travels the same distance daily.
I noticed that two of his legs travels 10km and the remaining two travels 12km.
Obviously two mules legs cannot be a 2km ahead of the other 2.

The mules is perfectly normal. So how come this be true ?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

You have $100 with you and you have to buy 100 balls with it. 100 is the exact figure and you can't go below or above the numbers and you have to use the entire $100. If there is no kind of tax applied how many of each of the following balls will you be able to buy:

Green Balls costing $6
Yellow Balls costing $3
Black Balls costing $0.10

Now, how many of each must you buy to fulfil the condition given?