Riddles even I can't figure it out!

This is as light as a feather, yet no man can hold it for long. What am I?

What is more useful when it is broken?

Why iron is important for female?

368=3

945=2

128=2

674=_?

• 5

• 7

• 1

• 2

What is the 5th letter of the alphabet?

June's mom has 5 children: January, February, March, April.

Who's the 5th children?

What does it say?

How many holes are there in a pipe?

• 2

• 3

• 4

• 5

What do you see?

• A ball

• A circle

• A sphere

3=._.._..

6=.._....

9=...._..

__.__._ + _..._._ = ?

• 8

• 5

• 7

• 2