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 ()

Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

Can you move 2 matchsticks to form four equal sized squares.

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

Can you identify the hidden rebus in the image below?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?