The Proof! tabletop card game is the inspiration behind our online game, the Weekly Challenge Math Puzzles. Each week we post a new set of nine cards that hides a challenging equation. This is a hand-picked selection of our math games that focus specifically on subtraction. Or see all of our math puzzles here.

JAN 01 2018

1

Find a Pair of 6's

JAN 22 2018

4

Find Any Triplet Using

At Least 6 Cards

JAN 29 2018

5

Find a Triplet of 7's

Using At Least 7 Cards

FEB 12 2018

7

Find Any Triplet of

Fractions

FEB 19 2018

8

Find Any Pair Less Than 0

MAR 05 2018

10

Find 9 Different Pairs

Using Exactly 3 Cards Each

MAR 12 2018

11

Find 4 Different Triplets

MAR 26 2018

13

Find Any Pair Using All

9 Cards

APR 09 2018

15

Find Any Triplet Less Than

0

APR 16 2018

16

Find Any Pair Using

Only Subtraction

APR 30 2018

18

Find Any Pair Using At

Least 3 Square Roots

MAY 07 2018

19

Find Any Pair Using the

6, 27, and 74 Cards

MAY 21 2018

21

Find 10 Different Quadruplets

Less Than 10

JUN 04 2018

23

Find Any Quintuplet

JUN 11 2018

24

Find Any Pair Greater

Than 0 Using Exactly 8

JUN 18 2018

25

Find a Pair of 44's

JUN 25 2018

26

Find 6 Different Pairs

Less Than 20 Using Exactly

JUL 23 2018

30

Find Any Pair Greater

Than 0 Using All 9 Cards

SEP 03 2018

36

Find Any Pair Greater

Than 0 Using All 9 Cards

SEP 17 2018

38

Find 14 Different Pairs

Greater Than 0 Using...

SEP 24 2018

39

Find a Pair of 18's

Using Only Subtraction

OCT 01 2018

40

Find 6 Different Pairs

Less Than 0 Using Exactly

OCT 15 2018

42

Find 5 Different Quintuplets

Greater Than 0

OCT 22 2018

43

Find Any Pair Less Than

100 Using All 9 Cards

NOV 05 2018

45

Find 5 Different Pairs Greater

Than 50 Using the 98, 64,

NOV 19 2018

47

Find Any Pair Greater

Than 0 Using All 9 Cards

DEC 03 2018

49

Find Any Pair Using Subtraction

At Least 6 Times

DEC 10 2018

50

Find 2 Different Triplets

Greater Than 10