Can you Find and name the hidden bird in the picture below ?

What number should come in place of the question mark below?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

How many Watermelons are there in the below picture?

Which tank will fill first?

What always comes into a house through the keyhole?

I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

Which five letter word can be added at the end of below word to form a
valid word?

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Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.