Algorithms
and Cryptography? Logic, Common Sense, And Numbers
By Lewis E. Love
1. THE MIND READER
a. pick a number (don't disclose
it to the instructor)
b. add ten (10 ) to the number
c. multiply the number by
two (2)
d. subtract six (6) from the
number
e. divide the number by two
(2)
f. subtract the original number
selected from the total
2. THE EXACT AMOUNT
OF WATER
With one three (3) liter container
and one five (5) liter container, how would you exactly measure four
(4) liters of water?
3. THE CORRECT MASS
You are given seven (7) objects
of the same shape and size; six (6) have the same mass; one (1) has
a greater mass than the others. How would you determine the object
with the greater mass, using an equal arm balance only twice?
4. FROM
THE EARTH TO THE MOON
You are on the earth and possess
a magic seed. Once it germinates, it doubles its length every day.
At this rate, the growing plant will reach the moon in thirtysix
(36) days. How long will it take, for the plant to reach half the
distance to the moon.
Back to Physics
in the Elementary School
