(NEXSTAR) — Are you smarter than an Oklahoma fifth-grader taking their annual math assessment test? As another new school year is underway, it’s never a bad idea to know what the kids are learning — ...

Add Yahoo as a preferred source to see more of our stories on Google. Sorry, it’s math time. But these are some of the easiest math quizzes we’ve ever put on ...

So, the difference between their age is given by => 31 – 8 = 23 years. Now, let the age of his father be 'x'. Let the age of his son be 'x-23'. Also Read: Math Riddles with Answers: Logic Puzzles That ...