Gerda is four years older than Thomas. 8 years ago Gerda was three times as old as Thomas.

How old are they both now?

Fred and Harry have 80 tokens together. After Fred lost 12 tokens to Harry, Harry now has three times as many as Fred. How many tokens did each have at the beginning?

One side of a rectangle is 18 cm long. If you lengthen this side by 2 cm while you shorten the other side by 4 cm, the area of the rectangle decreases by 32 cm².

How long are the two sides of the first rectangle?

Three siblings compare the contents of their piggy banks. Karin has € 5 more than Erna. Max has twice as much as both of them together. The total savings amount to € 45

How much does each child have?

For a concert, a total of 580 tickets were sold at 3 €and 2 €. How many of each kind were there if a total of 1,397 € was sold?

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Name and describe the three most important measures of central tendency. choose the correct answer below. a. the mean, sample size, and mode are the most important measures of central tendency. the mean of a data set is the sum of the observations divided by the middle value in its ordered list. the sample size of a data set is the number of observations. the mode of a data set is its highest value in its ordered list. b. the sample size, median, and mode are the most important measures of central tendency. the sample size of a data set is the difference between the highest value and lowest value in its ordered list. the median of a data set is its most frequently occurring value. the mode of a data set is sum of the observations divided by the number of observations. c. the mean, median, and mode are the most important measures of central tendency. the mean of a data set is the product of the observations divided by the number of observations. the median of a data set is the lowest value in its ordered list. the mode of a data set is its least frequently occurring value. d. the mean, median, and mode are the most important measures of central tendency. the mean of a data set is its arithmetic average. the median of a data set is the middle value in its ordered list. the mode of a data set is its most frequently occurring value.