AGE PROBLEM with detailed solutions | Civil Service Exam Math

Mathematical Keywords and Operators00:01:05

Explains how to identify mathematical operations from word problems. Keywords for addition include sum, increased by, and combined. Multiplication includes twice and triple. Division involves half, ratio, and quotient, while subtraction includes decreased by, difference, and fewer than.

Solving Two-Variable Age Problems00:05:10

Walks through solving a problem where the sum of two friends' ages is 15, with one being twice as old as the other. Shows the process of defining variables, creating an equation (A + 2A = 15), and solving for A.

Age Problems with Older Than Comparisons00:08:42

Demonstrates solving an age problem where Elmo is two years older than his brother. Provides step-by-step algebraic manipulation to isolate variables and find both individual ages.

Table Method for Complex Time-Based Problems00:11:04

Introduces the table method to organize data for problems involving time gaps (e.g., 'in two years'). Demonstrates this technique by solving a problem about a father's age relative to his son.

Solving Ratio-Based Age Problems00:16:48

Applies ratio logic to solve an age problem involving Romina and Daniela. Uses a common multiplier variable (n) to set up the equation based on their current ratio and their ages after a specific number of years.