🔎 MonsterGrade 4Reading: grades 3-4MultiplicationRoundingAdditionSubtractionDivision

The Golden Slime Caper

Someone snuck into the Monster Academy trophy room and swiped the Golden Slime Cup! Principal Ghoulihan needs your help to scan the clues, do the math, and find the real troublemaker.

Suspects

Possible suspects

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

21 of 21 still in play

Name	scare style	monster gear	writing hand	fur color	secret fear
Yeti	slime splashing	giant key	left handed	purple fur	squeaky toys
Cookie	shadow sneaking	bubbling potion	right handed	orange fur	tickle feathers
Casper	shadow sneaking	giant key	left handed	green fur	squeaky toys
Beast	slime splashing	spiked collar	left handed	orange fur	tickle feathers
Blobby	shadow sneaking	glowing map	right handed	green fur	tickle feathers
Spike	slime splashing	glowing map	left handed	purple fur	squeaky toys
Bowser	loud roaring	spiked collar	right handed	purple fur	tickle feathers
Skeletor	loud roaring	spiked collar	left handed	purple fur	tickle feathers
Gengar	laser staring	bubbling potion	left handed	orange fur	tickle feathers
Chewie	laser staring	spooky horn	left handed	purple fur	tickle feathers
Gorgon	laser staring	giant key	right handed	green fur	tickle feathers
Wolfman	shadow sneaking	bubbling potion	left handed	purple fur	squeaky toys
Hulk	wall climbing	spiked collar	left handed	purple fur	squeaky toys
Godzilla	shadow sneaking	spiked collar	right handed	purple fur	squeaky toys
Elmo	shadow sneaking	spiked collar	left handed	purple fur	tickle feathers
Groot	wall climbing	spooky horn	left handed	purple fur	squeaky toys
Dracula	shadow sneaking	spiked collar	right handed	green fur	squeaky toys
Shrek	shadow sneaking	glowing map	right handed	orange fur	tickle feathers
Frankenstein	slime splashing	spiked collar	right handed	green fur	squeaky toys
Mike	wall climbing	spiked collar	right handed	purple fur	squeaky toys
Grover	shadow sneaking	spiked collar	right handed	orange fur	tickle feathers

Clue 1

Multiplication facts (1-12)

We need to count the slime footprints left in the hallway. They are arranged in perfect rows and columns, so multiplying them will help us unlock the first clue!

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

132

110

132

110

132

100

12 × 11 =T

12 × 5 =N

10 × 11 =S

7 × 7 =C

5 × 10 =Y

7 × 1 =M

4 × 4 =P

1 × 6 =E

7 × 11 =R

11 × 1 =O

1 × 3 =H

10 × 7 =A

6 × 9 =G

8 × 3 =L

3 × 5 =I

10 × 10 =W

7 × 4 =D

0/17 letters found

Clue 2

Rounding

The heat-seeking monster radar is showing a blurry number. If we round it to the nearest ten, the screen will clear up and reveal the second clue.

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

5000

230

5000

2300

290

4300

2000

5000

2000

700

900

300

4300

3700

290

1100

230

5000

2300

110

4300

5000

3700

290

230

Round 34 to the nearest tenT

Round 110 to the nearest tenO

Round 227 to the nearest tenL

Round 5,162 to the nearest thousandE

Round 74 to the nearest tenH

Round 941 to the nearest hundredP

Round 1,625 to the nearest thousandD

Round 741 to the nearest hundredM

Round 1,064 to the nearest hundredS

Round 2,313 to the nearest hundredF

Round 3,655 to the nearest hundredW

Round 318 to the nearest hundredR

Round 4,317 to the nearest hundredN

Round 293 to the nearest tenA

Round 48 to the nearest tenI

0/15 letters found

Clue 3

Addition

Let us add up all the dropped monster teeth found near the trophy case. The grand total of these spooky clues will point us to our next lead.

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

8079

6169

9226

8921

9226

5987

2248

8079

9494

5987

6958

5987

3341

5987

8620

4339

9494

6212

5475

5987

2248

5820

6787

9226

5987

4048

8620

2941

6212

6218

8079

6212

8620

3493 + 4586 =T

1624 + 2424 =K

3286 + 2926 =O

3592 + 5329 =B

1942 + 999 =D

4717 + 3903 =Y

1454 + 1887 =W

2587 + 1752 =F

3802 + 2018 =Q

2504 + 3714 =G

4660 + 4834 =R

4302 + 2656 =N

2031 + 3444 =M

4740 + 2047 =U

2486 + 3683 =H

1185 + 1063 =S

6117 + 3109 =E

1926 + 4061 =A

0/18 letters found

Clue 4

Subtraction

The snack bar started with a full crate of bat treats, but some are missing! Subtracting the leftovers will tell us exactly how many the suspect ate.

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

6787

7200

5925

7938

4030

2133

2462

8637

7938

5872

5028

8637

4795

4030

2941

4091

3115

7938

5925

3115

5961

8952

2133

2067

5170

4030

4795

5170

1123

7200

5925

4030

4795

8335 - 1548 =W

4595 - 2462 =N

12478 - 3526 =I

6744 - 2714 =U

1237 - 114 =L

6325 - 2234 =B

5186 - 16 =P

9569 - 2369 =E

5060 - 265 =R

10139 - 4267 =A

7438 - 1513 =F

9270 - 1332 =O

3870 - 929 =M

8981 - 3020 =H

12452 - 3815 =C

6425 - 1397 =T

7030 - 3915 =S

5307 - 2845 =D

5171 - 3104 =Y

0/19 letters found

Clue 5

Division facts (1-12) — the last clue

To find the last clue, we must share the remaining green energy crystals equally among our monster-tracking drones. Do the division to boot them up!

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

12 ÷ 6 = ?

18 ÷ 3 = ?

3 ÷ 1 = ?

54 ÷ 6 = ?

45 ÷ 9 = ?

84 ÷ 7 = ?

40 ÷ 5 = ?

40 ÷ 4 = ?

10 ÷ 10 = ?

44 ÷ 4 = ?

32 ÷ 8 = ?

Step 2 — cross out the sentence with each answer

1.The villain shoots red lasers from its eyes, then rattles a giant key.

2.The villain climbs up the stone walls, then shakes its spiked collar.

3.The villain splashes glowing green slime, then rattles a giant key.

4.The villain shoots red lasers from its eyes, then shakes its spiked collar.

5.The villain slithers quietly through the dark shadows, then blows a spooky horn.

6.The villain slithers quietly through the dark shadows, then drops a bubbling potion.

7.The villain climbs up the stone walls, then blows a spooky horn.

8.The villain splashes glowing green slime, then drops a bubbling potion.

9.The villain lets out a super loud roar, then shakes its spiked collar.

10.The villain lets out a super loud roar, then blows a spooky horn.

11.The villain slithers quietly through the dark shadows, then shakes its spiked collar.

12.The villain shoots red lasers from its eyes, then checks a glowing map.

Solve it

Name the culprit

Choose the one suspect left standing.

Answer Key — The Golden Slime Caper

Culprit: Groot (wall climbing · spooky horn · left handed · purple fur · squeaky toys)

Clue 1 (Multiplication facts (1-12)): "THE MONSTER DOES NOT CARRY A GLOWING MAP"
12 × 11 = 132 (T) · 12 × 5 = 60 (N) · 10 × 11 = 110 (S) · 7 × 7 = 49 (C) · 5 × 10 = 50 (Y) · 7 × 1 = 7 (M) · 4 × 4 = 16 (P) · 1 × 6 = 6 (E) · 7 × 11 = 77 (R) · 11 × 1 = 11 (O) · 1 × 3 = 3 (H) · 10 × 7 = 70 (A) · 6 × 9 = 54 (G) · 8 × 3 = 24 (L) · 3 × 5 = 15 (I) · 10 × 10 = 100 (W) · 7 × 4 = 28 (D)
Clue 2 (Rounding): "THE LEFT HANDED IMPRINT WAS LEFT ON THE WALL"
Round 34 to the nearest ten = 30 (T) · Round 110 to the nearest ten = 110 (O) · Round 227 to the nearest ten = 230 (L) · Round 5,162 to the nearest thousand = 5000 (E) · Round 74 to the nearest ten = 70 (H) · Round 941 to the nearest hundred = 900 (P) · Round 1,625 to the nearest thousand = 2000 (D) · Round 741 to the nearest hundred = 700 (M) · Round 1,064 to the nearest hundred = 1100 (S) · Round 2,313 to the nearest hundred = 2300 (F) · Round 3,655 to the nearest hundred = 3700 (W) · Round 318 to the nearest hundred = 300 (R) · Round 4,317 to the nearest hundred = 4300 (N) · Round 293 to the nearest ten = 290 (A) · Round 48 to the nearest ten = 50 (I)
Clue 3 (Addition): "THE BEAST RAN AWAY FROM A SQUEAKY DOG TOY"
3493 + 4586 = 8079 (T) · 1624 + 2424 = 4048 (K) · 3286 + 2926 = 6212 (O) · 3592 + 5329 = 8921 (B) · 1942 + 999 = 2941 (D) · 4717 + 3903 = 8620 (Y) · 1454 + 1887 = 3341 (W) · 2587 + 1752 = 4339 (F) · 3802 + 2018 = 5820 (Q) · 2504 + 3714 = 6218 (G) · 4660 + 4834 = 9494 (R) · 4302 + 2656 = 6958 (N) · 2031 + 3444 = 5475 (M) · 4740 + 2047 = 6787 (U) · 2486 + 3683 = 6169 (H) · 1185 + 1063 = 2248 (S) · 6117 + 3109 = 9226 (E) · 1926 + 4061 = 5987 (A)
Clue 4 (Subtraction): "WE FOUND COAT CRUMBS OF SHINY PURPLE FUR"
8335 - 1548 = 6787 (W) · 4595 - 2462 = 2133 (N) · 12478 - 3526 = 8952 (I) · 6744 - 2714 = 4030 (U) · 1237 - 114 = 1123 (L) · 6325 - 2234 = 4091 (B) · 5186 - 16 = 5170 (P) · 9569 - 2369 = 7200 (E) · 5060 - 265 = 4795 (R) · 10139 - 4267 = 5872 (A) · 7438 - 1513 = 5925 (F) · 9270 - 1332 = 7938 (O) · 3870 - 929 = 2941 (M) · 8981 - 3020 = 5961 (H) · 12452 - 3815 = 8637 (C) · 6425 - 1397 = 5028 (T) · 7030 - 3915 = 3115 (S) · 5307 - 2845 = 2462 (D) · 5171 - 3104 = 2067 (Y)
Clue 5 (Division facts (1-12)): surviving statement (box 7) → Groot
12 ÷ 6 = 2 · 18 ÷ 3 = 6 · 3 ÷ 1 = 3 · 54 ÷ 6 = 9 · 45 ÷ 9 = 5 · 84 ÷ 7 = 12 · 40 ÷ 5 = 8 · 40 ÷ 4 = 10 · 10 ÷ 10 = 1 · 44 ÷ 4 = 11 · 32 ÷ 8 = 4

About this mystery

Grade level: Grade 4 math
Math topics: Multiplication, Rounding, Addition, Subtraction, Division
Reading level: grades 3-4
Theme: The Golden Slime Caper — set in Monster Academy
Format: Interactive online & printable worksheet with answer key
Solution: One unique, verified culprit among 21 suspects

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