What brings you down but never up?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?

What does this rebus mean?

O
N
C
E
TIME

By using all numbers, i.e. 123456789 and subtraction/addition, operators number 100 can be formed in many ways.
Example: 98 + 7 + 6 - 5 - 4 - 3 + 2 - 1 = 100

But if we add a condition use of the number 32 is a must. Then there are limited solutions.
One of such solution is: 9 - 8 + 76 + 54 - 32 + 1 = 100

Can you tell me any other solution?

What is more useful when it is broken?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?