using four eights (8) and a one (1) and one mathematical symbol , create the number 100

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

There is a unique number which when multiplied by any number from 1 to 6, we will get the new number that contains the same digits only.

Can you find that number?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

There is a movie name hidden in the picture that is attached with this question. Can you find out which movie is it?

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?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

What is the word or phrase below?
R | E | A | D

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?