Math Mysteries
🏀 BasketballGrade 1Reading: grades 1-2AdditionSubtractionSkip countingPlace valueMissing addends

The Great Hoop Dome Heist

Oh no! The golden championship game ball is missing from the Hoop Dome. A sneaky player snatched it right before the big game. We must use our math skills to find the snatcher and save the game!

Suspects

Possible suspects

Cross off a row as each clue rules it out. On screen, tap a row.

21 of 21 still in play
NameSignature ShotSuper GearShooting HandHeadband ColorCourt Distraction
MuggsyNo Look PassGolden SneakersRight HandedRed HeadbandShiny Camera Flash
JordanThree Point SwishGlowing JerseyLeft HandedRed HeadbandSmell of Popcorn
WiltsSuper Fast DribbleGolden SneakersRight HandedGreen HeadbandSmell of Popcorn
PennyThree Point SwishGolden SneakersLeft HandedRed HeadbandSqueaky Toy Noise
HardenDunk From Half CourtSticky GlovesRight HandedRed HeadbandSqueaky Toy Noise
KobeSuper Fast DribbleMega Bounce SocksLeft HandedBlue HeadbandSqueaky Toy Noise
DirkSuper Fast DribbleSqueaky ShoesLeft HandedGreen HeadbandShiny Camera Flash
BookerSuper Fast DribbleGlowing JerseyLeft HandedRed HeadbandShiny Camera Flash
ShaqSuper Fast DribbleSqueaky ShoesLeft HandedRed HeadbandSqueaky Toy Noise
SpudNo Look PassSticky GlovesLeft HandedBlue HeadbandShiny Camera Flash
KlayThree Point SwishMega Bounce SocksRight HandedGreen HeadbandSmell of Popcorn
TatumThree Point SwishSticky GlovesLeft HandedRed HeadbandSmell of Popcorn
LeBronThree Point SwishMega Bounce SocksLeft HandedRed HeadbandSqueaky Toy Noise
DameDunk From Half CourtMega Bounce SocksLeft HandedBlue HeadbandShiny Camera Flash
MagicSuper Fast DribbleMega Bounce SocksLeft HandedGreen HeadbandSmell of Popcorn
FoxHigh Jump BlockGolden SneakersRight HandedGreen HeadbandSqueaky Toy Noise
ZionNo Look PassGlowing JerseyLeft HandedRed HeadbandSqueaky Toy Noise
YaoDunk From Half CourtSticky GlovesLeft HandedRed HeadbandSqueaky Toy Noise
GiannisThree Point SwishSticky GlovesLeft HandedGreen HeadbandSqueaky Toy Noise
KyrieNo Look PassGlowing JerseyLeft HandedGreen HeadbandSmell of Popcorn
LukaHigh Jump BlockGlowing JerseyRight HandedBlue HeadbandSmell of Popcorn
Clue 1

Addition

Let us count the extra basketballs in the rack. We add the red balls and the blue balls to find the total.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

T
6
9
7
17
5
7
3
16
11
20
12
7
13
12
7
17
5
12
T
6
14
7
3
2
15
12
10
13
7
5
17
5
7
3
16
7
2
17
5 + 1 =T
1 + 2 =A
3 + 8 =Y
8 + 12 =F
5 + 4 =H
6 + 4 =L
1 + 1 =R
5 + 10 =G
8 + 4 =O
8 + 9 =S
9 + 7 =K
4 + 1 =N
8 + 5 =D
8 + 6 =W
4 + 3 =E
0/15 letters found
Clue 2

Subtraction

The coach had a pile of game tickets. Some fell out of his bag on the court. Subtract the lost ones to see what is left.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

T
2
4
11
13
6
3
3
18
6
9
17
4
15
15
T
2
17
1
6
T
2
4
T
2
4
11
3
11
14
T
2
4
18
9
16
3 - 1 =T
19 - 1 =A
15 - 6 =N
6 - 5 =W
6 - 2 =H
6 - 3 =L
9 - 3 =I
17 - 1 =D
19 - 4 =O
20 - 6 =F
15 - 2 =V
17 - 6 =E
19 - 2 =S
0/13 letters found
Clue 3

Skip counting

We need to count the sneakers left in the locker room. Let us skip count the shoes by twos to make it fast.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

S
10
45
16
8
36
26
35
90
110
35
S
10
6
80
55
55
S
10
90
110
130
90
28
80
S
10
130
55
36
35
8
120
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, ___, 12, 14S
Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10W
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, ___, 39, 42A
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55Q
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130O
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30K
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65L
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, ___, 30, 32H
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100I
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45Y
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110T
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20U
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, ___, 130, 140R
Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12E
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, ___, 140, 150P
0/15 letters found
Clue 4

Place value

The big scoreboard is blinking. It shows tens and ones. Let us read the place value to find the secret score.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

W
74
14
49
13
77
78
34
33
91
14
34
80
14
33
34
58
33
78
34
13
78
71
80
14
72
13
77
91
71
What number has 7 tens and 4 ones?W
What number has 1 ten and 3 ones?O
What number has 3 tens and 3 ones?A
What number has 9 tens and 1 one?R
What number has 5 tens and 8 ones?B
What number has 7 tens and 7 ones?U
What number has 7 tens and 2 ones?C
What number has 4 tens and 9 ones?F
What number has 1 ten and 4 ones?E
What number has 8 tens and 0 ones?H
What number has 7 tens and 8 ones?N
What number has 7 tens and 1 one?T
What number has 3 tens and 4 ones?D
0/13 letters found
Clue 5

Missing addends — the last clue

The team water crate must have ten bottles. Right now it only has some. How many more do we need to make ten?

First solve each problem. Then find each answer in the list below and cross that sentence out. One sentence will be left — that's exactly what the villain did!

Step 1 — solve these
8 + ___ = 12
7 + ___ = 17
10 + ___ = 13
1 + ___ = 9
7 + ___ = 19
10 + ___ = 16
5 + ___ = 12
8 + ___ = 9
9 + ___ = 14
1 + ___ = 12
4 + ___ = 13
Step 2 — cross out the sentence with each answer
1.The villain dribbles past the guard, then steals the ball away.
2.The villain dribbles past the guard, then passes to an open teammate.
3.The villain runs down the court, then swishes a three pointer.
4.The villain fakes to the left, then steals the ball away.
5.The villain dribbles past the guard, then swishes a three pointer.
6.The villain fakes to the left, then passes to an open teammate.
7.The villain dribbles past the guard, then blocks a high shot.
8.The villain runs down the court, then passes to an open teammate.
9.The villain leaps over the defense, then blocks a high shot.
10.The villain leaps over the defense, then slams down a massive dunk.
11.The villain dribbles past the guard, then slams down a massive dunk.
12.The villain runs down the court, then blocks a high shot.
Solve it

Name the culprit

Choose the one suspect left standing.

About this mystery

Grade level
Grade 1 math
Math topics
Addition, Subtraction, Skip counting, Place value, Missing addends
Reading level
grades 1-2
Theme
The Great Hoop Dome Heist — set in The Hoop Dome Arena
Format
Interactive online & printable worksheet with answer key
Solution
One unique, verified culprit among 21 suspects

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