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Money · Ages 7+ · Set B
The rice on the chessboard
Scan to mark
on screen
B
Name
Date
Start Finish
Goal: 15 min
Score/ 12
Remember: Doubling starts small and grows very fast, one square after another.

Questions

1
Each square holds double the one before. Which holds two hundred fifty-six?
the ninth squarethe second squarethe third square
2
Each square holds double the one before. Which holds sixty-four grains?
the seventh squarethe fourth square🔟the tenth square
3
Each square holds double the one before. Which holds two grains?
the eighth squarethe sixth squarethe second square
4
Each square holds double the one before. Which holds sixteen grains?
the third squarethe ninth squarethe fifth square
5
Each square holds double the one before. Which holds eight grains?
🔟the tenth squarethe fifth squarethe fourth square
6
🟦Does one, two, three, four double each time?
YesNo
7
Which row doubles each time?
🟠five, ten, twenty, forty🟫one, three, five, seven🟩two, four, six, eight
8
Which row doubles each time?
🟣four, eight, sixteen, thirty-two🟩two, four, six, eight🟫one, three, five, seven
9
Each square holds double the one before. Does the sixth square hold thirty-two grains?
YesNo
10
Which row doubles each time?
🟨ten, twenty, thirty, forty🔷three, six, twelve, twenty-four🟦one, two, three, four
11
Which row does not double each time?
🔷three, six, twelve, twenty-four🟩two, four, six, eight🟠five, ten, twenty, forty
12
Which row does not double each time?
🟠five, ten, twenty, forty🟨ten, twenty, thirty, forty🔶two, four, eight, sixteen
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 B
The rice on the chessboard
1the ninth square
2the seventh square
3the second square
4the fifth square
5the fourth square
6No
7five, ten, twenty, forty
8four, eight, sixteen, thirty-two
9Yes
10three, six, twelve, twenty-four
11two, four, six, eight
12ten, twenty, thirty, forty
Mark each answer, count the right ones and write the score on the sheet.