Can you find the hidden animal in the picture below?

Only one colour, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

Why is a river so rich ?

What English word has three consecutive double letters?

John speaks the truth only once a day in a week. Below are a few hints for you:

First: Days are Sunday, Monday and so on.
Second: One day he says, "I lie on Monday and Tuesday".
Third: On the next day, he says, "Today is either Thursday, Saturday or Sunday".
Fourth: On the next day, he says, "I lie on Wednesday and Friday".

Can you identify the day on which he speaks the truth?

Can you find the dog hidden in a group of pandas?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

How can one talk without saying a single word?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?