# Mark and John

Pro Problems > Math > Algebra > Equations > Word Problems > Linear > Age and Time## Mark and John

Mark is four years older than John. Twelve years ago, Mark was twice as old as John. How old is Mark now?

## Solution

In order to make it feasible for teachers to use these problems in their classwork, no solutions are publicly visible, so students cannot simply look up the answers. If you would like to view the solutions to these problems, you must have a Virtual Classroom subscription.## Similar Problems

### Happy Birthday

One year from today I will be six less than three times as old as I would have been 10 years ago if I had been born n years later.

Twenty years ago I was one third the age I would have been 15 years from now if I'd been born n years earlier.

How old am I?

### Jill's Age

Jill's age now is four more than twice what it was 7 years ago. How old is Jill?

### Age Doubling

Mike’s age is 12 more than Sue’s age. In 7 years, Mike will be twice as old as Sue. How old will each one be in ten years?

### Harvey's Age

In five years, Harvey will be three times as old as he was a few years ago. At that time, he was four years older than he was when he was a quarter of his current age. How old is Harvey now?

### Seconds, Minutes, Hours

A certain amount of time went by. During that time, the sum of the three hands’ (second, minute, hour) revolutions is 3386.425. How many seconds went by during this time?

### Boris and Vera

Vera is twice as old as Boris. In five years, their ages will add to 70. How old will they each be in ten years?

### How old is James?

James is half as old now as he will be when he is 60 years older than he was six years before he was half as old as he is now. How old will James be when his age is twice what it was 10 years after he was half his current age?

### Bill, Jane and Mike

Bill is twice as old as Jane, and Jane is twice as old as Mike. In two years, their ages will add to 48. How old is each?

### Minutes and Seconds

The number of times the second hand went around the clock is 140 more than forty times the number of times the minute hand went around the clock. How many minutes have passed in this time?

### Baby's Age

A baby's age in hours, minus his age in days, is 23% of what his age was in minutes, sixty-seven days ago. How old is the baby in days?