lnal is the nickel, a dollar and a nickel. 1.3 EXERCISES One of the most popular

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lnal is the nickel, a dollar and a nickel. 1.3 EXERCISES One of the most popular features in the journdl Teacher, p 5. Bra ublished by the National Council of Teachers of an Mathematics Mathematics, is the monthly calendar. It provides an inter- esting, unusual, or challenging problem for each day of the month. Some of these exercises, and others later in this text, are chosen from these calendars (the day, month, and year of publication of each problem are indicated). The authors nur H ter 2011 want to thank the many contributors for permission to use 6. A Re these problems. Use the various problem-solving strategies to solve PROI If the 2012th each problem. In many cases there is more than one pos- sible approach, so be creative 1. Broken Elevator A man enters a building on the first floor and runs up to the third floor in 20 seconds. At this rate, how many seconds would it take for the man to run frorm the first floor up to the sixth floor? (October 3, 2010) 7. How O ages di ages is found b after th mother? 2. Saving Her Dollars Every day Sally saved a penny,a dime, and a quarter. What is the least number of days required for her to save an amount equal to an integral8, An Alarm (counting) number of dollars? (January 11, 2012) figure to create exactly 3 equilateral triangles. (Anana equilateral triangle has all three sides the same length.) (February 20, 2011) room. Yo utes, your and your If all thre when is th (Novembe 3. Do You Have a Match? Move 4 of the matches in the Suda ku Sudokius an n × n puzzle that requires the solver

Explanation / Answer

I am solving the first question, Q1 in this case as per Chegg guidelines, post multiple question to get the remaining answers

Q1)

Man runs from first floor to third floor in 20 seconds.

So, he ran two flooprs in 20 seconds, which makes 20/2 seconds per floor or 10 seconds per floor

Since the rate is 10 seconds per floor, if he wants to go from floor 1 to floor 6, then the time taken will be

(6-1) floor * 10 sec/floor = 50 seconds

Hence the time taken in this case will be equal to 50 seconds

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