Can you find the odd number in the following?

2716, 4135, 5321 and 7145

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

Which alphabet letter is a question?

Replace The Question Mark Below With the Correct Number.

2 {38} 3
4 {1524} 5
6 {3548} 7
8 {????} 9

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

Before Balboa discovered the Pacific Ocean, which was the largest ocean before that?

I am first found in caves, now prolific online; I am a depiction, a drawing, a symbol, or sign. I will convey whichever mood you could wish; or for that matter, a fist, flask, or fish. What am I?

When we see 2 but call 10?

Can you start the fire using two pieces of wood?