1. CANINE COMPUTATION
Rhombus, the smartest dog in the world,
was doodling in his math diary when he came up with three
equations:
A-B=C
D/E=F
G+H=I
He was about to write a fourth equation
using multiplication when an interesting thought occurred
to him. Instead of using a new set of numbers (J, K, L)
for his fourth equation, he would use the answers of the
three existing equations:
C*F=I
Now the only question in his mind was,
"Can I replace the letters A through I with the digits
1 through 9 in such a way that all four of my equations
are correct?"
Answer:
A= 9 B= 5 C= 4 D= 6 E= 3 F= 2 G= 1 H= 7 I= 8
2. MYSTERY MULTIPLICATION
Use each of the digits 1, 2, 3, 4, 5
and 6 once only, in this multiplication problem to make
it correct.
? ?
x ?
----
? ? ?
Answer:
54
x3
----
162
3. EQUATION FRUSTRATION
Arrange the ten digits 0 to 9 in three
different equations, using three of the four operations
of addition, subtraction, multiplication, and division,
and using no signs except the ordinary +, -, x, & ¸ %.
Here is an example to make it clear (note that the example
is not correct because 3 was used twice and 2 was not
used at all):
3 + 4 = 7
9 - 8 = 1 5 X 6 = 30
Answer:
7 + 1 = 8
9 - 6 = 3 4 X 5 = 20
Both the number of entries and the number of winners
were down in the November Math Mania fun contest.
That's almost to be expected after the give October winner
total of 34.