Question:
What do the numbers 11, 69, and 88 all have in common?
Answer:
They read the same right side up and upside down.
Try another Brain Teaser:
500 at the beginning, 500 at the end,
5 in the middle is seen,
The first of all letters, the first of all figures
Take up their stations between,
String them all together, and you will see
The name of an ancient king.