Solve the Following Riddle

question 34

Multiple Choice

Solve the following riddle. ​ I am thinking of a 4-digit number. The sum of the digits is 15. Starting from left, the third digit is double the first and the fourth is double the second. All the digits are different. ​

• A) 2539
• B) 1428
• C) 1424
• D) 2482
• E) 1248

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Definitions:

Positive Relationship

A positive relationship in economics indicates that an increase in one variable is associated with an increase in another variable.

Cartesian Coordinate System

A coordinate system that specifies each point uniquely in a plane by a set of numerical coordinates, which are the distances to the point from two perpendicular directed lines.

Variable

An element, feature, or factor that is likely to vary or change; in scientific experiments, the characteristic that is tested to observe its effects.

Time

A measurable period during which events occur, processes take place, or conditions exist.