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Challenge of the Month

1.  A restaurant bought some rice on Sunday. Each day the restaurant used 120 pounds of rice.  After 5 days, there was 1/5 of the rice left.  How many pounds of rice did the restaurant buy on Sunday?  (6th grade and up)
 


 

2. It was a dark and stormy night in London in 1905. A traveler named Maxwell lost his wallet and walked to a hotel. He asked the hotel manager if he could pay with his gold chain that consists of 7 rings linked together. The hotel manager looked at his chain and said: "Yes, one gold ring per night. I have a wire cutter to separate the chain." Maxwell said: “Great, I will stay for 7 nights.”

a) What is the minimum number of gold rings Maxwell needs to cut to pay for the hotel ONE ring per night for 7 nights?

b. If Maxwell can get change (in rings ) from the hotel each night (i.e. pay 1 ring one night and the next night pay 2 rings, and get 1 ring back, resulting in 2 rings paid for 2 nights), What is the minimum number of rings he needs to cut? (4th grade and up)

 

 

 

 

 

                                                              
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Current number of math problems on this site 74 63 68 76 65 54 59

 

 

 
Free Math for Kids (first grade, second grade, third grade, fourth grade, fifth grade, sixth grade and seventh grade) 


This site contains first through seventh grade free math problems with answers that help you with math competitions. Brain teasers, hard math problems that you (parents. students and teachers) can practice to prepare for elementary mathematics contests or middle school, junior high school math competitions such as Math Olympiad Contest, Math Super Bowl and Math Counts. 

 
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