Can you make four (4) nines (9) equal 100?

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

At my favorite fruit stand,
an orange costs 18,
a pineapple costs 27,
and a grape costs 15.
Using the same logic, can you tell how much a mango costs?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Which country gets ill every time?

The following sentence is false. The preceding sentence is true.
Are these two sentences true or false?

Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

What has lots of eyes, but can’t see?

With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims, proclaiming might; physically joining with a single bite. What am I?