Spencecanty Weekly Extensions

New Challenge Question for the week....solve the problem and hand it in by Friday!!!

Where should addition signs be placed between digits of the number 987654321 to get a total of 90? 

For the week of October 19 - 23

Ollie can solve 32 math riddles per hour, and his friend Alfston takes three hours to solve the same number. If they both work on them, how long will it take for them to solve 32 math riddles?

For the week of October 12 - 16

No new puzzle this week as no one tried the last week one.

For the week of October 5th - October 9th

Cheri, Beth and Jacinta are daughters of Mr. Sullivan, Mr. Marchand and Mr. Benoit. Four of these people are playing tennis doubles. Mr. Benoit's daughter and Mr. Sullivan are partners. Cheri's father and Mr. Marchand's daughter are also partners. There aren't any father-daughter combinations.

Week of Sept. 28 - October 2

Briarcliff Elementary School has a telephone chain to notify people of weather-related school cancellations. In the first round of calls, the school secretary calls two different homes. In the second round, each of those families calls two other families. Each family has to make only two calls, but the chain is still a fast way to notify a lot of people.

How many families are called in the fifth round of calls?

How many rounds are needed to call all 123 families at your school?

Explain your answer in as many ways as you can.

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