🦕 DinosaursGrade 3Reading: grades 3-4RoundingWord problemsAdditionSubtractionDivision
Case of the Super Bad Superhero
A villain hides among the heroes of Mathhattan and has kidnapped the Mayor. The police can't tell friend from phony — only a sharp math detective can. Solve each clue's math to decode it, cross suspects off the list, and name the one hero left standing.
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 | Main Power | Extra Power | Mask | Hair | Weakness |
|---|---|---|---|---|---|
| Lady Bug | Super Speed | Sonic Scream | Masked | Orange | Cookies |
| Razor | Super Speed | Flight | Masked | Purple | Silver |
| Zapman | Invisibility | Shape Shifting | Masked | Purple | Silver |
| Starlight | Mind Control | Shape Shifting | Masked | Purple | Cookies |
| Colossal Crush | Energy Blasts | Sonic Scream | Unmasked | Purple | Silver |
| Quasar | Invisibility | Flight | Masked | Green | Sunlight |
| Typhoon | Invisibility | Shape Shifting | Masked | Orange | Silver |
| Thunder Hawk | Super Speed | Sonic Scream | Masked | Purple | Silver |
| Blitzfire | Mind Control | Sonic Scream | Unmasked | Orange | Sunlight |
| Owl Man | Mind Control | Poisonous Burps | Unmasked | Purple | Sunlight |
| Captain Nucleus | Super Speed | Sonic Scream | Unmasked | Orange | Cookies |
| Splash | Mind Control | Sonic Scream | Unmasked | Purple | Cookies |
| Iron Vox | Energy Blasts | Poisonous Burps | Masked | Purple | Sunlight |
| Mrs. Amazing | Super Speed | Poisonous Burps | Unmasked | Green | Sunlight |
| Dare Girl | Super Speed | Super Strength | Masked | Purple | Silver |
| Mega Mage | Mind Control | Super Strength | Unmasked | Green | Cookies |
| Nightgale | Invisibility | Shape Shifting | Masked | Orange | Sunlight |
| The Giggler | Energy Blasts | Shape Shifting | Masked | Purple | Silver |
| Lion Man | Super Speed | Flight | Unmasked | Purple | Silver |
| Major Fury | Teleportation | Sonic Scream | Unmasked | Green | Sunlight |
| Blinker | Invisibility | Poisonous Burps | Masked | Green | Silver |
Clue 1
Rounding
A torn note flutters out of the Mayor's office — but the words are hidden behind a math code. Solve it to read 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.
T
6000
60
200
800
9000
5000
5000
4000
9000
50
40
4000
50
50
70
T
6000
300
5000
7000
Round 6,206 to the nearest thousandT
Round 56 to the nearest tenH
Round 237 to the nearest hundredE
Round 802 to the nearest hundredV
Round 69 to the nearest tenO
Round 7,352 to the nearest thousandY
Round 36 to the nearest tenC
Round 47 to the nearest tenN
Round 4,309 to the nearest thousandA
Round 5,434 to the nearest thousandL
Round 300 to the nearest hundredF
Round 9,276 to the nearest thousandI
0/12 letters found
Clue 2
Word problems
A witness left a message at the scene, locked behind more math. Work it out to hear what they saw.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Awitnesssawthevillainwas.
M
55
52
70
60
36
22
There were 65 masks. 10 were used up. How many masks are left?M
There were 58 capes. 6 were used up. How many capes are left?A
There are 6 hideouts with 6 masks in each. How many masks in all?E
There were 40 gadgets. 18 were used up. How many gadgets are left?D
There are 12 hideouts with 5 masks in each. How many masks in all?K
There were 79 gadgets. 9 were used up. How many gadgets are left?S
0/6 letters found
Clue 3
Addition
Down at the docks, someone scared the villain off and scribbled how. Crack the numbers to find out.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
A
408
748
A
408
705
304
420
876
A
408
692
558
705
632
725
725
720
528
558
A
408
834
720
369
528
558
692
632
240
369
720
528
420
369
748
866
558
692
140 + 268 =A
347 + 373 =T
361 + 387 =L
294 + 234 =H
73 + 167 =W
601 + 275 =C
344 + 348 =R
306 + 560 =V
135 + 234 =I
401 + 231 =O
379 + 326 =D
165 + 255 =S
122 + 182 =Y
300 + 425 =F
443 + 391 =N
215 + 343 =E
0/16 letters found
Clue 4
Subtraction
The clean-up crew found something the villain dropped. Do the math to see what it was.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
Y
135
217
364
121
377
126
597
585
650
421
207
126
597
585
217
121
643
364
421
643
149
816
734
207
377
421
517
734
816
421
816
650
734
816
736
207
Y
135
217
421
517
207
585
650
207
256
816
126
478 - 343 =Y
269 - 143 =N
723 - 206 =W
948 - 298 =T
833 - 248 =S
321 - 104 =O
455 - 91 =U
787 - 51 =M
842 - 245 =D
911 - 177 =H
209 - 2 =A
1035 - 219 =E
242 - 93 =L
390 - 269 =F
893 - 250 =P
698 - 321 =I
600 - 179 =R
444 - 188 =K
0/18 letters found
Clue 5
Division facts (1-12) — the last clue
You've almost got it. One last set of numbers will reveal exactly how the villain pulled it off.
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
20 ÷ 2 = ?
14 ÷ 7 = ?
90 ÷ 10 = ?
36 ÷ 3 = ?
48 ÷ 8 = ?
22 ÷ 2 = ?
50 ÷ 10 = ?
8 ÷ 8 = ?
32 ÷ 4 = ?
6 ÷ 2 = ?
44 ÷ 11 = ?
Step 2 — cross out the sentence with each answer
1.The villain turns invisible to slip past everyone, then lets out a poisonous burp to weaken them.
2.The villain fires crackling energy blasts, then shape-shifts into a familiar face.
3.The villain bends minds to make victims obey, then shape-shifts into a familiar face.
4.The villain teleports behind victims without warning, then tears open locked doors with raw strength.
5.The villain fires crackling energy blasts, then unleashes a sonic scream.
6.The villain fires crackling energy blasts, then tears open locked doors with raw strength.
7.The villain races through the streets at impossible speed, then unleashes a sonic scream.
8.The villain races through the streets at impossible speed, then lets out a poisonous burp to weaken them.
9.The villain turns invisible to slip past everyone, then shape-shifts into a familiar face.
10.The villain races through the streets at impossible speed, then tears open locked doors with raw strength.
11.The villain teleports behind victims without warning, then shape-shifts into a familiar face.
12.The villain races through the streets at impossible speed, then shape-shifts into a familiar face.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — Case of the Super Bad Superhero
Culprit: Thunder Hawk (Super Speed · Sonic Scream · Masked · Purple · Silver)
- Clue 1 (Rounding): "THE VILLAIN CANNOT FLY"Round 6,206 to the nearest thousand = 6000 (T) · Round 56 to the nearest ten = 60 (H) · Round 237 to the nearest hundred = 200 (E) · Round 802 to the nearest hundred = 800 (V) · Round 69 to the nearest ten = 70 (O) · Round 7,352 to the nearest thousand = 7000 (Y) · Round 36 to the nearest ten = 40 (C) · Round 47 to the nearest ten = 50 (N) · Round 4,309 to the nearest thousand = 4000 (A) · Round 5,434 to the nearest thousand = 5000 (L) · Round 300 to the nearest hundred = 300 (F) · Round 9,276 to the nearest thousand = 9000 (I)
- Clue 2 (Word problems): "MASKED"There were 65 masks. 10 were used up. How many masks are left? = 55 (M) · There were 58 capes. 6 were used up. How many capes are left? = 52 (A) · There are 6 hideouts with 6 masks in each. How many masks in all? = 36 (E) · There were 40 gadgets. 18 were used up. How many gadgets are left? = 22 (D) · There are 12 hideouts with 5 masks in each. How many masks in all? = 60 (K) · There were 79 gadgets. 9 were used up. How many gadgets are left? = 70 (S)
- Clue 3 (Addition): "A LADY SCARED OFF THE ANTIHERO WITH SILVER"140 + 268 = 408 (A) · 347 + 373 = 720 (T) · 361 + 387 = 748 (L) · 294 + 234 = 528 (H) · 73 + 167 = 240 (W) · 601 + 275 = 876 (C) · 344 + 348 = 692 (R) · 306 + 560 = 866 (V) · 135 + 234 = 369 (I) · 401 + 231 = 632 (O) · 379 + 326 = 705 (D) · 165 + 255 = 420 (S) · 122 + 182 = 304 (Y) · 300 + 425 = 725 (F) · 443 + 391 = 834 (N) · 215 + 343 = 558 (E)
- Clue 4 (Subtraction): "YOU FIND STRANDS OF PURPLE HAIR WHERE THE MAYOR WAS TAKEN"478 - 343 = 135 (Y) · 269 - 143 = 126 (N) · 723 - 206 = 517 (W) · 948 - 298 = 650 (T) · 833 - 248 = 585 (S) · 321 - 104 = 217 (O) · 455 - 91 = 364 (U) · 787 - 51 = 736 (M) · 842 - 245 = 597 (D) · 911 - 177 = 734 (H) · 209 - 2 = 207 (A) · 1035 - 219 = 816 (E) · 242 - 93 = 149 (L) · 390 - 269 = 121 (F) · 893 - 250 = 643 (P) · 698 - 321 = 377 (I) · 600 - 179 = 421 (R) · 444 - 188 = 256 (K)
- Clue 5 (Division facts (1-12)): surviving statement (box 7) → Thunder Hawk20 ÷ 2 = 10 · 14 ÷ 7 = 2 · 90 ÷ 10 = 9 · 36 ÷ 3 = 12 · 48 ÷ 8 = 6 · 22 ÷ 2 = 11 · 50 ÷ 10 = 5 · 8 ÷ 8 = 1 · 32 ÷ 4 = 8 · 6 ÷ 2 = 3 · 44 ÷ 11 = 4
About this mystery
- Grade level
- Grade 3 math
- Math topics
- Rounding, Word problems, Addition, Subtraction, Division
- Reading level
- grades 3-4
- Theme
- Case of the Super Bad Superhero — set in the island of Mathhattan
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects