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Problems on Ages (Quick Tips and Tricks) 1) If the current age of a person be X, then - age after n years = X + n - age n years ago = X – n - n times the age = nX - If ages in the numerical are mentioned in ratio A : B, then A : B will be AX and BX 2) If sum of ages...
1. Ratio: We use ratios to make comparisons between two things. When we express ratios in words, we use the word "to"--we say "the ratio of something to something else." Ratios can be written in several different ways: as a fraction, using the word "to", or with a ...
What is Cramer’s Rule and how to solve linear equation problems using Cramer’s rule?In mathematics, to solve linear equations, we use matrix form. Matrix is the rectangular array of elements enclosed in brackets “[]”. There are some methods and rules of matrix used to so...