Answer this question:Rosalina receives gifts from three people on her wedding day. How many gifts did she get if Emilio gave 11 gifts, Jorge gave 6 gifts, and Pedro gave 4 gifts?
If Emilio presents 11 gifts and Jorge 6 gifts, together they have presented 11 + 6 = 17 gifts. If Pedro also gives Rosalinda 4 gifts, Rosalinda's total number is 17 + 4 = 21 gifts.
The answer is 21.

Answer this question:Mickey and Johnny are having a contest to see who can run around their block the most. One time around the block equals 200 meters. Johnny runs around the block 4 times. Mickey runs around the block half as many times as Johnny. What is the average distance run by Johnny and Mickey?
Mickey runs around the block twice because half of 4 is 2. Mickey runs 400 meters in total because 2 times 200 equals 400. Johnny runs 800 meters because 4 times 200 equals 800. In total, they run 1200 meters because 400 plus 800 equals 1200. On average, they run 600 meters because 1200 divided by 2 equals 600.
The answer is 600.

Answer this question:Out of the 500 marbles that Cindy had, she gave her four friends 80 marbles each. What's four times the number of marbles she has remaining?
Cindy gave her four friends 80 marbles each, a total of 4 * 80 = 320 marbles. She was left with 500 - 320 = 180 marbles. Four times the number of marbles she has remaining is 180 * 4 = 720.
The answer is 720.

Answer this question:Heather helps her neighbour pick weeds out of her garden. She gets paid 5 cents for every weed she picks. On average, how many seconds can she take to pick a weed if she wants to earn $10 an hour?
In an hour, she needs to earn $10 * 100 cents / $1 = 1000 cents. In an hour, she must pick 1000 cents / 5 cents = 200 weeds. There are 1hr * (60 minutes / 1 hr) = 60 minutes in an hour. There are 60 minutes * (60 seconds / 1 minute) = 3600 seconds in an hour. She has 3600 seconds / 200 = 18 seconds to pick each weed.
The answer is 18.