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

In a basket of apples,
when counted in twos, there was one extra
when counted in threes, there were two extra when counted in fours, there were three extra
when counted in fives, there were four extra
when counted in sixes, there was five extra.

However, if the apples were counted in sevens, no extra apple was left. Can you calculate the minimum number of apples that were present in the basket?

What goes through cities and fields, but never moves?

What is at the end of a rainbow?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

Who can jump higher than a Mountain?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?