What Adam and Eve do not have but the rest of the people have?

what does this picture(rebus) riddle means ?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

I am a number I am not an odd number I am higher than 90 I am not higher than 100 If you subtract me from 100, you get nothing. What number am I?

What does below chemistry rebus means?

How many Watermelons are there in the below picture?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

Can you write down eight eights so that they add up to one thousand?

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?