Best riddles with simple answers

What is the greatest worldwide use of cowhide?

What gets shorter when you close your arm?

Which vehicle is spelled the same forwards and backwards?

What do you call a cat crossed with a fish?

I sometimes come in a can but I'm not food. I sometimes come in a bottle but I'm not a beverage. I come in different colors but I'm not a rainbow. I'm sometimes used with canvas but I'm not a tent. I'm used with a brush but I'm not toothpaste. What Am I?

Our dinner guests cry that we are evil, when they notice their place in the meal. But its no big deal why; we are just one big happy tribe! And we get really fed up with people! Who, What or Are we?

Look at me. I can bring a smile to your face, a tear to your eye, or even a thought to your mind. But, I can't be seen. What am I?

With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims, proclaiming might; physically joining with a single bite. What am I?

Take away my first letter, and I still sound the same. Take away my last letter, I still sound the same. Even take away my letter in the middle, I will still sound the same. I am a five letter word. What am I?

What does man love more than life, Fear more than death or mortal strife. What the poor have, the rich require, and what contented men desire. What the miser spends and the spendthrift saves, And all men carry to their graves?