🌊 Harp sealsGrade 3Reading: grades 5-6RoundingAdditionSubtractionMultiplicationDivision
The Great Ice Floe Heist
Someone snuck into the Frosty Bay Wildlife Station and swiped the sacred golden fish statue from the pup nursery! Check the clues to identify the sneaky seal bandit.
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 | Ice Skill | Gear | Dominant Flipper | Fur Pattern | Distraction |
|---|---|---|---|---|---|
| Nanuq Nick | Blizzard Whistling | Snow Tracker Map | Left Flipper | Spotted Pelt | Whistle Sounds |
| Polar Pete | Ice Sliding | Thermal Goggles | Right Flipper | Spotted Pelt | Whistle Sounds |
| Barnaby Blue | Ice Sliding | Frost Whistle | Right Flipper | Spotted Pelt | Bright Lanterns |
| Glacier Gabe | Deep Diving | Beacon Collar | Right Flipper | Fluffy White Fur | Bright Lanterns |
| Iceberg Ivy | Deep Diving | Frost Whistle | Right Flipper | Spotted Pelt | Whistle Sounds |
| Crisp Chris | Glacier Climbing | Beacon Collar | Right Flipper | Silver Coat | Bright Lanterns |
| Shelly Shine | Blizzard Whistling | Ice Pick Harness | Right Flipper | Silver Coat | Herring Snacks |
| Salty Sam | Blizzard Whistling | Frost Whistle | Right Flipper | Spotted Pelt | Herring Snacks |
| Waddles White | Snow Tunneling | Thermal Goggles | Right Flipper | Silver Coat | Herring Snacks |
| Flipper Frank | Glacier Climbing | Beacon Collar | Right Flipper | Spotted Pelt | Herring Snacks |
| Skipper Sky | Snow Tunneling | Ice Pick Harness | Right Flipper | Spotted Pelt | Whistle Sounds |
| Snoopy Seal | Deep Diving | Thermal Goggles | Right Flipper | Spotted Pelt | Bright Lanterns |
| Drift Dave | Snow Tunneling | Thermal Goggles | Right Flipper | Spotted Pelt | Whistle Sounds |
| Tundra Tim | Glacier Climbing | Frost Whistle | Right Flipper | Silver Coat | Whistle Sounds |
| Shiver Mia | Snow Tunneling | Frost Whistle | Right Flipper | Fluffy White Fur | Bright Lanterns |
| Blizzard Bob | Deep Diving | Snow Tracker Map | Right Flipper | Spotted Pelt | Herring Snacks |
| Coral Chloe | Deep Diving | Ice Pick Harness | Left Flipper | Silver Coat | Herring Snacks |
| Penny Pup | Ice Sliding | Thermal Goggles | Right Flipper | Silver Coat | Herring Snacks |
| Pippin Paws | Snow Tunneling | Beacon Collar | Right Flipper | Fluffy White Fur | Bright Lanterns |
| Harbor Hank | Ice Sliding | Beacon Collar | Left Flipper | Spotted Pelt | Herring Snacks |
| Finnegan Frost | Deep Diving | Beacon Collar | Right Flipper | Spotted Pelt | Whistle Sounds |
Clue 1
Rounding
A sensor on the ice pack only gives rounded numbers for safety, so we must round the distance readings to trace the bandit.
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
800
300
9000
600
40
600
8000
9000
3000
T
800
300
30
600
4000
50
20
3000
9000
8000
20
3000
90
300
30
6000
4000
9000
600
600
Round 809 to the nearest hundredT
Round 600 to the nearest hundredS
Round 5,651 to the nearest thousandR
Round 8,142 to the nearest thousandP
Round 52 to the nearest tenO
Round 29 to the nearest tenA
Round 8,987 to the nearest thousandE
Round 94 to the nearest tenK
Round 255 to the nearest hundredH
Round 36 to the nearest tenU
Round 4,028 to the nearest thousandN
Round 16 to the nearest tenI
Round 3,248 to the nearest thousandC
0/13 letters found
Clue 2
Addition
We gathered all the fish ration vouchers left along the drift ice and need to add them up to find the 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.
T
715
450
489
551
582
489
931
716
286
551
489
931
911
256
551
489
404
T
715
450
489
251
345
345
251
884
450
T
715
296
911
251
973
973
489
345
463 + 252 =T
323 + 166 =E
174 + 171 =R
235 + 215 =H
400 + 182 =N
338 + 593 =A
128 + 276 =D
485 + 399 =G
176 + 110 =Y
147 + 104 =I
625 + 348 =P
336 + 380 =K
343 + 568 =L
214 + 337 =S
88 + 168 =U
122 + 174 =F
0/16 letters found
Clue 3
Subtraction
Comparing the total number of rescue sleds before and after the commotion shows how many supplies were moved.
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
495
214
143
506
669
472
424
261
T
495
424
669
472
456
143
424
T
495
782
856
782
689
424
555
214
261
348
T
495
856
143
348
782
689
472
424
348
513 - 18 =T
756 - 87 =A
1061 - 205 =L
770 - 346 =D
1052 - 363 =U
393 - 250 =E
664 - 109 =W
320 - 59 =I
572 - 100 =N
338 - 124 =H
586 - 130 =C
1039 - 257 =O
578 - 72 =B
718 - 370 =S
0/14 letters found
Clue 4
Multiplication facts (1-12)
The guard seals logged equal rows of ice crates in the storage cave, so multiplying gives us the total count.
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
12
21
32
84
18
18
121
22
24
18
121
8
77
18
96
22
T
2
T
2
8
77
96
8
70
T
2
144
60
12
1 × 2 =T
7 × 3 =A
11 × 2 =O
6 × 3 =S
12 × 5 =U
4 × 6 =W
11 × 11 =H
12 × 7 =K
7 × 11 =D
8 × 4 =C
12 × 12 =F
2 × 4 =E
12 × 8 =P
6 × 2 =R
7 × 10 =L
0/15 letters found
Clue 5
Division facts (1-12) — the last clue
To split the recovered pup blankets equally among five rescue shelters, division reveals our final clue.
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
100 ÷ 10 = ?
24 ÷ 8 = ?
20 ÷ 5 = ?
20 ÷ 10 = ?
144 ÷ 12 = ?
99 ÷ 9 = ?
5 ÷ 1 = ?
9 ÷ 9 = ?
18 ÷ 2 = ?
54 ÷ 9 = ?
32 ÷ 4 = ?
Step 2 — cross out the sentence with each answer
1.The villain slid across the frozen bay, then flashed a beacon collar light.
2.The villain climbed up the towering glacier, then checked a snow tracker map.
3.The villain tunneled straight through snowdrifts, then adjusted their thermal goggles.
4.The villain slid across the frozen bay, then adjusted their thermal goggles.
5.The villain tunneled straight through snowdrifts, then flashed a beacon collar light.
6.The villain dived deep beneath the ice pack, then latched an ice pick harness.
7.The villain dived deep beneath the ice pack, then blew into a frost whistle.
8.The villain slid across the frozen bay, then blew into a frost whistle.
9.The villain dived deep beneath the ice pack, then checked a snow tracker map.
10.The villain dived deep beneath the ice pack, then flashed a beacon collar light.
11.The villain climbed up the towering glacier, then latched an ice pick harness.
12.The villain whistled an icy arctic breeze, then latched an ice pick harness.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Great Ice Floe Heist
Culprit: Iceberg Ivy (Deep Diving · Frost Whistle · Right Flipper · Spotted Pelt · Whistle Sounds)
- Clue 1 (Rounding): "THE SUSPECT HAS NO ICE PICK HARNESS"Round 809 to the nearest hundred = 800 (T) · Round 600 to the nearest hundred = 600 (S) · Round 5,651 to the nearest thousand = 6000 (R) · Round 8,142 to the nearest thousand = 8000 (P) · Round 52 to the nearest ten = 50 (O) · Round 29 to the nearest ten = 30 (A) · Round 8,987 to the nearest thousand = 9000 (E) · Round 94 to the nearest ten = 90 (K) · Round 255 to the nearest hundred = 300 (H) · Round 36 to the nearest ten = 40 (U) · Round 4,028 to the nearest thousand = 4000 (N) · Round 16 to the nearest ten = 20 (I) · Round 3,248 to the nearest thousand = 3000 (C)
- Clue 2 (Addition): "THE SNEAKY SEAL USED THEIR RIGHT FLIPPER"463 + 252 = 715 (T) · 323 + 166 = 489 (E) · 174 + 171 = 345 (R) · 235 + 215 = 450 (H) · 400 + 182 = 582 (N) · 338 + 593 = 931 (A) · 128 + 276 = 404 (D) · 485 + 399 = 884 (G) · 176 + 110 = 286 (Y) · 147 + 104 = 251 (I) · 625 + 348 = 973 (P) · 336 + 380 = 716 (K) · 343 + 568 = 911 (L) · 214 + 337 = 551 (S) · 88 + 168 = 256 (U) · 122 + 174 = 296 (F)
- Clue 3 (Subtraction): "THE BANDIT DANCED TO LOUD WHISTLE SOUNDS"513 - 18 = 495 (T) · 756 - 87 = 669 (A) · 1061 - 205 = 856 (L) · 770 - 346 = 424 (D) · 1052 - 363 = 689 (U) · 393 - 250 = 143 (E) · 664 - 109 = 555 (W) · 320 - 59 = 261 (I) · 572 - 100 = 472 (N) · 338 - 124 = 214 (H) · 586 - 130 = 456 (C) · 1039 - 257 = 782 (O) · 578 - 72 = 506 (B) · 718 - 370 = 348 (S)
- Clue 4 (Multiplication facts (1-12)): "TRACKS SHOW SHED SPOTTED PELT FUR"1 × 2 = 2 (T) · 7 × 3 = 21 (A) · 11 × 2 = 22 (O) · 6 × 3 = 18 (S) · 12 × 5 = 60 (U) · 4 × 6 = 24 (W) · 11 × 11 = 121 (H) · 12 × 7 = 84 (K) · 7 × 11 = 77 (D) · 8 × 4 = 32 (C) · 12 × 12 = 144 (F) · 2 × 4 = 8 (E) · 12 × 8 = 96 (P) · 6 × 2 = 12 (R) · 7 × 10 = 70 (L)
- Clue 5 (Division facts (1-12)): surviving statement (box 7) → Iceberg Ivy100 ÷ 10 = 10 · 24 ÷ 8 = 3 · 20 ÷ 5 = 4 · 20 ÷ 10 = 2 · 144 ÷ 12 = 12 · 99 ÷ 9 = 11 · 5 ÷ 1 = 5 · 9 ÷ 9 = 1 · 18 ÷ 2 = 9 · 54 ÷ 9 = 6 · 32 ÷ 4 = 8
About this mystery
- Grade level
- Grade 3 math
- Math topics
- Rounding, Addition, Subtraction, Multiplication, Division
- Reading level
- grades 5-6
- Theme
- The Great Ice Floe Heist — set in Frosty Bay Wildlife Station
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects