It takes less than a minute. Work this out as you read  - but don't cheat by reading the bottom first.

1.  First of all, pick the number of times a week that you would like to go out to eat. It has to be more than once but less than 10.

2.  Multiply this number by 2.

3.  Add 5.

4.  Multiply it by 50.

5.  If you have already had your birthday this year add 1758. If  you haven't, add 1757.

6.  Now subtract the four digit year that you were born.  You  should have a three digit number.

Conclusion

The  first digit of this was your original number - how many times you want to go out to restaurants in a week.

The next two numbers are YOUR AGE!

And 2008 is the only year it will ever work, so spread it around.