2. Theoretical Framework
The capacity and ability to solve problems is not acquired only by solving many problems. It is favored by acquiring ease and familiarity with different solving techniques and by discovering the mental processes used in solving one of these techniques. These processes can be learned and assimilated when they are known and practiced (Sanchez et al., 2002). Polya (2004), mentioned that leaning to different problem-solving strategies is just like one's desire to perceive an object with two different senses. Resulting a person to persuade himself.