Monday, March 30, 2015

Problem of The Week - Spring 2015 - Week #12

THE PROBLEM 

If the same letters represent the same digit and different letters represent different digits, what digit does the letter A represent?


(Source: Noetic Learning Math Contest 2009  spring, Grade 5)





Monday, March 23, 2015

Problem of The Week - Spring 2015 - Week #11

THE PROBLEM 

Teams A, B, C and D were in a baseball tournament.  Each team played each other team once. Team A beat team D. Teams A, B and C won the exact same number of games. How many games did team D lose?

(Source: Noetic Learning Math Contest 2009  fall, Grade 5)

Sunday, March 15, 2015

Problem of The Week - Spring 2015 - Week #10

THE PROBLEM 

A group of 36 students are visiting an amusement park. The tickets are $6 for an individual or $30 for a group up to 10 people. What is the minimum amount the group has to pay?

(Source: Noetic Learning Math Contest 2012  fall, Grade 4)

Sunday, March 8, 2015

Problem of The Week - Spring 2015 - Week #9

THE PROBLEM 

A diagonal is a line segment that connects non-adjacent vertices in a polygon. How many diagonals does an octagon have?




(Source: Noetic Learning MathContest 2013 fall, Grade 6)


Sunday, March 1, 2015

Problem of The Week - Spring 2015 - Week #8

THE PROBLEM 

Barbara, Becky and Beth dressed up as princesses for Halloween. One was Snow White. One was Sleeping Beauty. One was Cinderella. Becky is not Sleeping Beauty and she went trick-or-treating with Snow White. Beth and Sleeping Beauty are sisters. Who is Snow White?






Sunday, February 22, 2015

Problem of The Week - Spring 2015 - Week #7

THE PROBLEM 


There are 5 houses on a street: house A, B, C, D and E. The distance between any two adjacent houses is 100 feet.  There are 2 children living in house A, 3 children living in house B, 4 children living in house C, 5 children living in house D and 6 children living in house E.   If the school bus can only make one stop on that street, in front of which house the bus should stop so that the sum of walking distance among all children will be the least? 


(Source: the Noetic Learning Math Contest 2010  Fall, Grade 5)

Saturday, February 14, 2015

Problem of The Week - Spring 2015 - Week #6

THE PROBLEM

Nil and Ethan are brothers. They left their home at the same time and drove to the same beach.  Nil drove at a speed of 30 miles per hour. Ethan drove at a speed of 20 miles per hour. Nil arrived at the beach 0.5 hour earlier than Ethan. What is the distance between their home and the beach?


(Source: the Noetic Learning Math Contest 2010  spring, Grade 5)