RHL School

Mathematics Problem Solving
Volume 4, Number 7, October 19, 1998

Mystery Numbers

1. Take the least number of days in any month. Multiply that number times the greatest even number that is less than ten. Add that product to the number of hours in a week. The mystery number is __________.



2. Take the number that equals half a dozen. Then, subtract the number of vowels in the name of the eighth month of the year. Add that result to the number of letters in the last month of the year. Add to that, the number of legs that an insect has. The mystery number is __________.



3. Take the number of planets that are closer to the sun than the one we live on. Multiply that number times the sum of the digits in the year 1998. Add the digits of that result together and subtract the sum from 10. The mystery number is __________.



4. This mystery number is twice the number of meters in a kilometer. It is __________.Copyright 1998 RHL

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