## Wednesday, August 26, 2009

### BRAINTENANCE: RIDE THE BRAIN TRAIN.

Dear Friends:

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And now, for some serious Braintenance:

1. How much better (in terms of a percentage) than the original is a new model which costs half the price and does the job in half the time?

2. How much better (in terms of a percentage) than the original is a new version that does three times as much work at one-fourth the price?

3. If Juan has only 80% of the IQ of his elder brother, Pincus (both children are the products of either an adoption or a mixed marriage), but Juan always earns 50% more than his brother, how much more efficient (in terms of a percentage) is Juan?

4. If you take three steps forward and one step back, how long (in total steps forward) will it take for you to advance by fifty steps? Is there a formula for solving this type of problem?

5. If your anticipated lifespan is 80 years, and you spend an average of 8 hrs per day sleeping, for how many years of your life will you have been awake?

Faithfully,

Douglas Castle