Decode this picture on T-Shirt and tell what it says ?

Find the missing number in the image below.

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?

Forwards I am heavy, backward I am not. What am I?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to a high death toll. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail, which proved deadly. What was it?

What work can one never finish?

Find the hidden panda in the image below.