I look at you, you look at me I raise my right, you raise your left. What am I?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

What is common among 11, 69, and 88?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

There was a greenhouse.
Inside the greenhouse, there is a white house.
Inside the white house, there is a red house.
Inside the red house, there are lots of babies.

What is It?

What number divided by 4 is the same as that number minus 4?

Two trains start at the same time, one from Bangalore to Mysore and the other from Mysore to Bangalore. if they arrive at their destinations one hour and four hours respectively after passing one another, how much faster is one train running than the other?