# Monthly Archives: November 2013

## Mean of 41

A set of seven different positive integers has a median of and a mean of . What is the greatest possible value of one of the seven positive integers? Source: mathcontest.olemiss.edu 11/18/2013 SOLUTION First guess and check MedianĀ Mean too … Continue reading

Posted in Problem solving
Tagged arithmetic mean, grade 6, guess and check, median, number sense
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## 10 Digit Call

A typical telephone number in the United States used to be digits. While you can still use a seven-digit code in most areas, a multitude of regions have begun using ten-digit telephone numbers. If the entire country goes to a … Continue reading

## How Big is a Trillion

Part 1. First determine the sum of all the digits needed to write each counting number from through . For example, the sum of all the digits needed to write each counting number from through would be . Part 2. … Continue reading

Posted in Problem solving
Tagged exponent, grade 6, grade 8, large number, number sense, pattern, power
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