Age Model Question

by Anonymous
(Country Unknown)

A is 40% of his brother's age. In 21 years time, A is 75% of his brother's age. What is A's age now?

Here's My Answer
by Zach

Step 1: This question involves the Constant Difference Concept. For Percentage questions, more often than not, it is easier to convert the percentages to fractions to facilitate drawing of models. Since A is 40% of his brother's age, we draw 2 boxes to represent A's 40% and 5 boxes to represent his brother's 100%.

To see the rest of the answer, click here

Click here to post comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Ask Grade 5 Question or Post Answer/Comment.

Enjoy this page? Please pay it forward. Here's how...

Would you prefer to share this page with others by linking to it?

  1. Click on the HTML link code below.
  2. Copy and paste it, adding a note of your own, into your blog, a Web page, forums, a blog comment, your Facebook account, or anywhere that someone would find this page valuable.