Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

A worker is to perform work for you for seven straight days. In return for his work, you will pay him 1/7th of a bar of gold per day. The worker requires a daily payment of 1/7th of the bar of gold. What and where are the fewest number of cuts to the bar of gold that will allow you to pay him 1/7th each day?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?

What has one letter and starts with an E?

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

There are three houses in a straight row. One is red, one is blue, and one is white. The red house is left of the middle. The blue house is right of the middle. Where's the white house?