Remember: Random means the next pick is a surprise, and nobody can know it ahead of time. A computer can pick random numbers, like shaking a bag of cards.
Read and answer
Read the story, then answer.
Shake the bagIt is game night at Tavi's house, but there are no dice in the game box. "Bo, can you roll for us?" asks Tavi. Bo thinks hard and says, "One! Two! Three, four, five, six!" "That is just counting," laughs Tavi. "We need numbers nobody can guess!" So Mina fetches a cloth bag and six paper cards, writes one to six on them, and drops them in. Shake, shake, shake! Bo pulls out a card: a four. He puts it back and shakes again. Out come a two, then a six, then a six again. Could anyone have known a six would come twice? No, and that is random. Later Bo keeps a tally of twelve rolls, and some numbers come up often, and one never comes up at all.
1
Bo counted "One, two, three, four, five, six" for his roll. Why was that not a good roll?
Everyone could guess the next numberThe numbers were too bigBo said them too fast
2
Every card in the bag has the same chance, but one can come twice in a row.
TrueFalse
3
Look at Bo's tally. Which number came up the most?
TwoSixFour
4
Bo rolled twelve times. The number three came up times.
5
Circle everything that is random.
Rolling a diceCounting one, two, threePulling a card from a shaken bagThe days of the week in orderShuffling a pack of cards
6
A six cannot come up twice in a row, because that would not be random.
TrueFalse
What is random?
7
Six came up 4 times and two came up 3 times. Together they came up times.
8
Join each word to what it means.
1random
2not random
3a surprise
4a tally
Anobody can know the next one
Byou can know what comes next
Ca count of every roll
Dno pattern to follow
9
Put game night in order.
Bo pulls a card from the shaken bag
Bo counts one to six
Mina shakes the game box and finds no dice
Mina puts six numbered cards in a bag
10
Mix-up to fix: Tavi says, "The next card must be a three, because a three has not come up yet." What is the mix-up?
Random is not tidy: it does not take turns, so nobody can know the next cardThree can never come upTavi should have counted in order
11
Stretch: Bo shakes the bag of six cards, numbered 1 to 6, and pulls one. Circle everything that could happen.
A fourA sixA six, right after a sixA seven
12
Write the numbers 1 to 6 on small papers and put them in a bag. Pull one out, write it down, and put it back. Do this five times and write your numbers.
13
Draw a cloth bag with six numbered cards peeking out.
Scan the code at the top to mark this sheet on screenTake a photo of your answers or type them. It is marked for you automatically, and your score is kept.
Answer key · Set A
Game night with no dice
1Everyone could guess the next number Counting in order is not random. A game needs numbers nobody can guess.
2True A six came up twice in a row, and nobody could have known it would.
3Six Six has the tallest bar, 4 rolls out of 12.
40 Three has no bar at all, so it never came up.
5Rolling a dice, Pulling a card from a shaken bag, Shuffling a pack of cards Nobody can know the next number from a dice, the next card from a shaken bag, or the order of a shuffled pack. Counting and the days of the week come in order.
6False One card can come twice in a row. That is what random looks like.
77 4 + 3 = 7.
81-A, 2-B, 3-D, 4-C Random means a surprise with no pattern. A tally is a count of every roll.
94, 2, 1, 3 First they find there are no dice, then Bo counts, which is not random, then Mina makes the bag, and then Bo pulls a card.
10Random is not tidy: it does not take turns, so nobody can know the next card Random is not tidy and does not take turns. The next card is a surprise.
11A four, A six, A six, right after a six Any card from 1 to 6 could come out, even a six again. There is no card with a seven on it.
12Your own words: a grown-up reads it.
Mark each answer, count the right ones and write the score on the sheet.