Replace the question mark with the correct number below.

The richest man in the city Mr Rechard is kidnapped. James Bond is appointed to the case. At the crime scene, a note is found written by Mr Richard. The note read:

"First of January, Fourth of October, Fifth of March, Third of June."

James Bond knew that somehow, the killer's name was hidden in the note. The following were the suspects:

Jack Richard, the son and the heir of property.
John Jacobson, the employee of Richard.
June Richard, the wife of Richard.

James Bond took only a few moments to deduce the killer's name. Can you tell who was the killer?

I am an odd number. Take away a letter and I become even. What number am I?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

what does this picture(rebus) riddle means ?