The equation 5+5+5=550 is a riddle where the directions are to make the equation true by adding only one single line. The answer is to change the equation from 5+5+5=550 to 545+5=550 or 5+545=550.
Know MoreThis is a very simple riddle because the plus sign just has to be reworked into a 4 to make the solution work. It can fool many people though because the equation at first just looks erroneous.
A similar riddle could be 3+3+7=350. Adding a straight line to one of the plus signs will change it to a four, fixing the equation. These types of brain teasers are common in logic books and collections of mind exercises.
Learn more in AlgebraWord equations are equations in which mathematical operations are applied to words instead of numbers. Word equations are commonly used in chemistry and are used to show common chemical reactions. Word equations are written with the name of the substance instead of the chemical abbreviation.
Full Answer >A demand equation is an algebraic representation of product price and quantity. Because demand can be represented graphically as a straight line with price on the y-axis and quantity on the x-axis, a demand equation can be as basic as a linear equation. They can also be much more complex, however, and can require significant algebraic manipulation.
Full Answer >An inverse equation, or inverse function, is an equation that reverses another equation. If an equation will give the value of y when providing x, the inverse equation will give the value of x when providing y.
Full Answer >The general equation of a circle in the Cartesian coordinate system is (x-a)^{2} + (y-b)^{2} = r^{2}. The point (a,b) represents the center of the circle and the value of r represents the radius of the circle.
Full Answer >