Puzzle and Games: Guess The Digit
Here's a game that you can play with students or to sharpen your wits. I will let you figure out the solution and how you tackle these puzzles is up to you.
Each of the blanks, ____, needs a digit, from 0 to 9. One of the digits fills in all the blanks in the puzzle.
Have fun!
Easy Level: One Blank
Example: ___2 + 15 = 47
The missing digit is 3, since 32 + 15 = 47
3___ + 50 = 82 9___ + 27 = 120
___8 + 36 = 94 40 + 5___ = 97
__0 + 82 = 112 ___9 + 33 = 52
5___ + 48 = 104 42 + 3___ = 78
28 + 7___ = 103 52__ + 33 = 559
1__4 + 37 = 221 380 + __7 = 437
Medium Level: Two Blanks
Example: 8___ + ___6 = 119
Answer: 3, since 83 + 36 = 119
5__ + ___8 = 80 ___6 + ___4 = 150
8__ + ___1 = 136 7___ + 3___ = 116
5___ + ___3 = 64 ___8 + ___7 = 55
4___ + ___3 = 98 8___ + 3___ = 124
___8 + 3__ = 137 1__5 + __3 = 248
__4__ + 88 = 330 __43 + __6 = 819
7__3 + 1__6 = 969 45___ + 5__6 = 956
3__8 + __62 = 480 45___ + __45 = 798
51__ + 36___ = 878 4__8 + 38__ = 810
Harder Level: Three Blanks
4__ + 5__ + __2 = 128 5__ + __6 + 3__ = 98
3__ + __4 + __7 = 146 8__ + __5 + __3 = 172
5__ + __3 + __ 5 = 226 4__ + 5___ + 6__ = 159
__4 + __7 + ___0 = 281 __50 + 3__ + 4__ = 732
__4__ + 50___ = 846 __3___ + __6 = 147
__8__ + 5__ = 742 51__ + __6__ = 876
Eddie
All original content copyright, © 2011-2020. Edward Shore. Unauthorized use and/or unauthorized distribution for commercial purposes without express and written permission from the author is strictly prohibited. This blog entry may be distributed for noncommercial purposes, provided that full credit is given to the author.
Here's a game that you can play with students or to sharpen your wits. I will let you figure out the solution and how you tackle these puzzles is up to you.
Each of the blanks, ____, needs a digit, from 0 to 9. One of the digits fills in all the blanks in the puzzle.
Have fun!
Easy Level: One Blank
Example: ___2 + 15 = 47
The missing digit is 3, since 32 + 15 = 47
3___ + 50 = 82 9___ + 27 = 120
___8 + 36 = 94 40 + 5___ = 97
__0 + 82 = 112 ___9 + 33 = 52
5___ + 48 = 104 42 + 3___ = 78
28 + 7___ = 103 52__ + 33 = 559
1__4 + 37 = 221 380 + __7 = 437
Medium Level: Two Blanks
Example: 8___ + ___6 = 119
Answer: 3, since 83 + 36 = 119
5__ + ___8 = 80 ___6 + ___4 = 150
8__ + ___1 = 136 7___ + 3___ = 116
5___ + ___3 = 64 ___8 + ___7 = 55
4___ + ___3 = 98 8___ + 3___ = 124
___8 + 3__ = 137 1__5 + __3 = 248
__4__ + 88 = 330 __43 + __6 = 819
7__3 + 1__6 = 969 45___ + 5__6 = 956
3__8 + __62 = 480 45___ + __45 = 798
51__ + 36___ = 878 4__8 + 38__ = 810
Harder Level: Three Blanks
4__ + 5__ + __2 = 128 5__ + __6 + 3__ = 98
3__ + __4 + __7 = 146 8__ + __5 + __3 = 172
5__ + __3 + __ 5 = 226 4__ + 5___ + 6__ = 159
__4 + __7 + ___0 = 281 __50 + 3__ + 4__ = 732
__4__ + 50___ = 846 __3___ + __6 = 147
__8__ + 5__ = 742 51__ + __6__ = 876
Eddie
All original content copyright, © 2011-2020. Edward Shore. Unauthorized use and/or unauthorized distribution for commercial purposes without express and written permission from the author is strictly prohibited. This blog entry may be distributed for noncommercial purposes, provided that full credit is given to the author.