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

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?

I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

I make two people out of one. What am I?

Can you decipher the two rows to find the hidden word?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?