It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Whats the next number in the below number sequence pattern.

Can you find out the remainder when 3^300 is divided by 5?

What are the 50th, 63rd and 100th numbers in the sequence below?
4, 5, 8, 8, 9, 9, 12, 13, 13, 13, 17, 18, ...

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.

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

What am I?

What does this rebus puzzle means ?

Guess the hidden movie name?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?