Steve Wyborney
ESTI - MYSTERIES
Estimation Meets
Math Mysteries
Esti – Mystery #5
Steve Wyborney
Before seeing the clues, estimate how many beads are in the jar.
As the clues appear, use the information to narrow the possibilities to a smaller set. Then use estimation to determine which of the remaining answers is the most reasonable.
Steve Wyborney
Clue #1
Clue #2
Clue #3
Clue #4
Clue #1
The answer is a 2-digit number.
Clue #2
The answer is
an odd number.
Clue #3
If there were 3 more beads, the number would be a multiple of 10.
10, 20, 30 …
Clue #4
The number of beads is divisible by 3.
3, 6, 9 …
Steve Wyborney
By combining the clues and estimation, you now have enough information to determine the answer.
87 objects
The reveel
Click to see the answer.
Steve Wyborney
Esti - Mysteries
Mystery #5
(for PowerPoint)
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