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May answers
Four winners in May Math Mania
Four kids answered all the May Math Mania
problems correctly during the windup of the 2008-09 fun math
competition.
With the school year winding up, Ms. Math Mania,
Amy Ruzicka, and Young
Saint Louis.com also are taking a summer vacation.
But, we hope you continue your interest in math during the
summer because math is one of life's constants.
The more math you know, the better will be your total education.
The four winners in the May Math Mania were:
Benjamin LeDeaux of St. Louis, Durga Kullakanda
of Maryland Heights, Shiori Tomatsu of Clayton and
Ryan Wahidi of Creve Coeur.
Since this is the final Math Mania for the
current school year, YSL.com is going to award
$10 Borders' gift certificates to each of the winners.
The answers for the May Math Mania questions
were:
May Math Mania SOLUTIONS
Some people believe that January 1, 2000
is the first day of the 21st century. Other people believe
that the honor belongs to January 1, 2001. But everyone
should agree that January 1, 2002 is the first "sum-day"
of the new century- when you write out that date in standard
notation, it becomes 01/01/02, and 1+1=2. More generally,
a sum-day is a date in which the day and month add up
to the year. With that in mind:
What is the last sum-day of the 21st century?
Answer: The last sum-day
of the 21st century is December 31, 2043, because 12+31=43,
and both the month and day are as big as possible.
2. SUM THREE-DIGIT NUMBERS
There are four 3-digit numbers in which
each equals the sum of the cubes of its digits.
Three of them are:
Do you know what the fourth one is? HINT:
It does not begin with 0, otherwise it isn't a 3-digit
number.
Answer: 371
Piper really wanted to know how much
money she would get from Grandpa for her birthday. But
Grandpa didn't want to tell her. Instead he said: "You
get so much!"
"But how much is so much?" Pi asked.
"If I gave you so much, plus so much,
plus the half of so much, plus 1/4 of so much, plus $1,
you would have $100. How much will Piper get?
Answer: $36: Let "so much" equal
s and use an equation to solve.
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