Can anyone tell me a word in the English dictionary which has a silent 'z'?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

What has a bottom at the top?

The two towns are exactly 100 km apart. John leaves City A driving at 30 km/hr and Jacob leaves City B half an hour later driving at 60 km/hr. Who will be closer to City A when they meet?

Who can jump higher than a Mountain?

Identify the hidden meaning behind this picture?

Can you find the missing piece of the Porsche?

What can you hold in your right hand, but never in your left hand?

A man was driving a black truck. His lights were not on. The moon was not out. A lady was crossing the street. How did the man see her?

By what process could you make a 'Tea-Table' into food?