Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

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

How is the moon similar to a dollar?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

Can you count the number of triangles in the picture below?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?

A wealthy man lives alone in a small cottage. Being partially handicapped he had everything delivered to his cottage. The mailman was delivering a letter one Thursday when he noticed that the front door was ajar. Through the opening he could see the man's body lying in a pool of dried blood. When a police officer arrived he surveyed the scene. On the porch were two bottles of warm milk, Monday's newspaper, a catalog, flyers, and unopened mail. The police officer suspects it was foul play. Who does he suspect and why?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

What Time Should the last watch show in the below figure?