When it's bad luck to meet a black cat?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

If,

20 % 5 = 24

21 % 7 = 33

42 % 6 = 67

Then;

66 % 6 = ?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

Can you identify the hidden rebus in the image below?

You can hear me, but you can't touch or see me.

What am I?

During which month do people sleep the least?

Akbar called Birbal and asked him to draw a line on the floor. He asked Birbal to make that line smaller without erasing it. Birbal smiled and did it before Akbar could blink his eyes.

How did he managed to do it?

A sundial has the fewest moving parts of any timepiece. Which has the most?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?