20mathematicsIf there is a 40% chance that you will get a red light at a certain traffic intersection, what is the probability of you passing through the intersection with green lights three times in a row?Show AnswerLearn MoreShare
4mathematicsAlan and Brigitte are beginning a bike race. Alan begins riding at 12 miles per hour, and ten minutes later Brigitte begins riding at 15 miles per hour. How many minutes will it take her to catch up to Alan?Show AnswerLearn MoreShare
1mathematicsThis mysterious number, the base of a natural logarithm, is related to natural and exponential growth. What is this number called, and what is its decimal value?Show AnswerLearn MoreShare
8mathematicsHow many degrees are there between boiling and freezing point of water in degrees fahrenheit?Show AnswerLearn MoreShare
5mathematicsWhat is the area, to nearest whole number, of an equilateral triangle whose perimeter is 300 meters?Show AnswerLearn MoreShare
9mathematicsTo the nearest square inch, what is the surface area of a balloon which is 20 inches in diameter?Show AnswerLearn MoreShare
13mathematicsHow many of the whole numbers from 1 to 100 are either divisible by 7 or include a 7 in their digits?Show AnswerLearn MoreShare
3mathematicsIn order to estimate the population of fish in a lake, a biologist catches 75 fish, marks them, releases them. Next month she catches 75 fish and finds that 5 are tagged. Use this to estimate the fish population in the lake.Show AnswerLearn MoreShare
21mathematicsa. What was the last year which read the same right side up as upside down? b. What will be the next year?Show AnswerLearn MoreShare
18mathematicsIf the difference between two numbers is 6, and the difference of their squares is 180, what is the sum of the numbers?Show AnswerLearn MoreShare
8mathematicsYou begin writing down the letters of the alphabet in this pattern: You write A one time, B two times, C three times, D four times, and so on. What letter is 100th on the list?Show AnswerLearn MoreShare
4mathematicsThis region was a kingdom of Czechoslovakia until the 15th century, when it passed to Hungary and then to the Hapsburgs. It became the core of the new state of Czechoslovakia in 1918. Today the name can refer to certain artistic intellectuals. Which region?Show AnswerLearn MoreShare
4mathematicsCan you think of two numbers for which the sum of their squares is 628 and the difference of their squares is 340?Show AnswerLearn MoreShare
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