The more of this there is, the less you see. What is it?

Which tank will fill first?

Can you find out which triangle will have a bigger area among the following?
1. A triangle with sides 300, 400 and 500
2. A triangle with sides 300, 400 and 700

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

What work can one never finish?

What is black when you buy it, red when you use it, and gray when you throw it away?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

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

I am not a bull but I have horns.
I am not an ass but I have a pack saddle.
Wherever I go, I leave silver behind me.

Who am I?