If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

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?

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?

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

Find the next number in the sequence

1, 2, 6, 21, 88, __?

Solve the mathematical equation in the picture below.

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Move three sticks of the spiral below to form a square.

Can you make four (4) nines (9) equal 100?

There are six people in a family namely M, N, O, P, Q and R.

R and O are brother and sister.

N is the brother of Q's husband.
P is the father of M and grandfather of R.

How many male members are in the family?