What is the below Rebus indicate?

Which digit occurred maximum times between the number 1 and 1000?

If an electric train is travelling south, then which way is the smoke going?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

What is next number in the pattern below:

131 517 192 123 ?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

Solve the equation in the image by looking at the pattern closely.

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?