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

Which English verb becomes past tense just by rearranging the letters?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

A Shopkeeper sold a few chickens to four different customers on a particular day. It was such that each customer purchased half of the remaining chickens and half the chicken more.

Can you find out how many chicken were sold by the shopkeeper on that day if we tell you that the fourth customer bought a single chicken ?

I can turn polar bears white.
I can make anyone dance.
I can make everyone cry
I can make your hands clap
I can make you thin.
I can make you smile.
I can make you smile

Can you guess the riddle?

In a basket of apples,
when counted in twos, there was one extra
when counted in threes, there were two extra when counted in fours, there were three extra
when counted in fives, there were four extra
when counted in sixes, there was five extra.

However, if the apples were counted in sevens, no extra apple was left. Can you calculate the minimum number of apples that were present in the basket?

Can you find out which options fits best with the missing column?

I am an odd number. Take away a letter and I become even. What number am I?

What question can you never answer yes to?