Can you solve the photo plexer logic ?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

I am lying and I always lie. Tell me whether I am lying or telling the truth.

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

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

How many letters are in the alphabet?

Which wheel of car does not rotate when you turn your car right?

What is the next number in this matchsticks series riddle?

Rebus Puzzle Definition: A rebus is an illusion device that uses pictures to represent words or parts of words.
What does This Rebus Puzzle Identify?