Important Formulas – Age
Important Formulas on “Problems on Ages” :
1. If the current age is x, then n times the age is nx.
2. If the current age is x, then age n years later/hence = x + n.
3. If the current age is x, then age n years ago = x – n.
4. The ages in a ratio a : b will be ax and bx.
Change of Ratio between Two Numbers
Suppose two numbers are in the ratioand when a number is added to each of these numbers, the ratio between them changes to
Then, we can defineas follows, which when multiplied by and gives the initial numbers.
Note: ifis subtracted from each of the numbers, use same formula with
Let the numbers beand
Difference and Ratio between Two Numbers
Sum and Ratio between Two Numbers