Grade 3Reading: grades 3-4MultiplicationRoundingAdditionSubtractionDivision
Mystery of the Lost Crystal Monkey
A sneaky bandit swiped the Golden Monkey Statue from the basecamp museum! Detective, use the jungle clues to track down the thief before they escape on the ferry.
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 | Gear Item | Side Tool | Dominant Hand | Headwear | Jungle Hazard |
|---|---|---|---|---|---|
| Cole Compass | Grappling Hook | Rope Ladder | Left Handed | Red Cap | Flashlight Beam |
| Ella Echo | Grappling Hook | Water Canteen | Right Handed | Red Cap | Loud Whistle |
| Leo Pathfinder | Laser Torch | Night Goggles | Left Handed | Blue Bandana | Flashlight Beam |
| Chloe Canyon | Compass Watch | Map Scroll | Left Handed | Blue Bandana | Loud Whistle |
| Ben Boulder | Laser Torch | Water Canteen | Right Handed | Red Cap | Net Trap |
| Finn Forest | Laser Torch | Water Canteen | Right Handed | Red Cap | Flashlight Beam |
| Zoe Zenith | Paraglider | Water Canteen | Right Handed | Blue Bandana | Flashlight Beam |
| Owen Outpost | Paraglider | Rope Ladder | Right Handed | Yellow Helmet | Loud Whistle |
| Alex Explorer | Grappling Hook | Night Goggles | Left Handed | Red Cap | Net Trap |
| Eli Expedition | Grappling Hook | Signal Flare | Left Handed | Yellow Helmet | Flashlight Beam |
| Ava Alpine | Compass Watch | Map Scroll | Left Handed | Yellow Helmet | Flashlight Beam |
| Maya Mapmaker | Grappling Hook | Map Scroll | Right Handed | Blue Bandana | Flashlight Beam |
| Kai Crater | Paraglider | Water Canteen | Right Handed | Red Cap | Flashlight Beam |
| Luke Lookout | Grappling Hook | Rope Ladder | Right Handed | Red Cap | Flashlight Beam |
| Mia Meadow | Grappling Hook | Night Goggles | Left Handed | Red Cap | Loud Whistle |
| Tara Trail | Paraglider | Water Canteen | Left Handed | Blue Bandana | Loud Whistle |
| Nora Navigator | Paraglider | Signal Flare | Right Handed | Red Cap | Flashlight Beam |
| Max Summit | Compass Watch | Map Scroll | Right Handed | Red Cap | Flashlight Beam |
| Lily Log | Laser Torch | Map Scroll | Right Handed | Blue Bandana | Net Trap |
| Ruby Ridge | Compass Watch | Signal Flare | Right Handed | Blue Bandana | Net Trap |
| Ray River | Grappling Hook | Water Canteen | Right Handed | Red Cap | Net Trap |
Clue 1
Multiplication facts (1-12)
You inspect five crates of gear stored in the supply tent. Count the items grouped in equal rows to decode 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
21
22
48
44
132
18
49
56
T
21
49
56
49
18
84
T
21
54
132
70
70
42
132
18
42
7
56
4
18
132
10
25
10
132
70
48
7 × 3 =T
11 × 12 =A
7 × 7 =D
7 × 12 =O
1 × 10 =L
1 × 4 =G
1 × 7 =S
7 × 6 =Y
11 × 4 =B
10 × 7 =R
12 × 4 =E
6 × 9 =C
2 × 11 =H
2 × 9 =N
7 × 8 =I
5 × 5 =F
0/16 letters found
Clue 2
Rounding
The digital tracker screen only shows rounded distances to the nearest ten. Round the numbers to unlock 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.
T
60
5000
400
T
60
9000
200
30
6000
900
900
5000
3000
20
9000
8000
50
5000
T
60
5000
200
80
600
400
600
T
60
3000
3000
4000
500
200
9000
6000
900
Round 62 to the nearest tenT
Round 379 to the nearest hundredE
Round 5,485 to the nearest thousandH
Round 52 to the nearest tenG
Round 529 to the nearest hundredM
Round 857 to the nearest hundredS
Round 3,707 to the nearest thousandL
Round 16 to the nearest tenW
Round 231 to the nearest hundredA
Round 565 to the nearest hundredD
Round 8,407 to the nearest thousandI
Round 6,345 to the nearest thousandK
Round 3,432 to the nearest thousandO
Round 8,987 to the nearest thousandR
Round 26 to the nearest tenC
Round 79 to the nearest tenN
0/16 letters found
Clue 3
Addition
You combine the total number of footprints found along the muddy riverbank. Add them together to reveal the third 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.
A
483
469
594
555
883
902
822
576
410
A
483
815
902
410
555
883
902
822
469
620
A
483
217
815
770
A
483
594
620
569
822
902
620
217
288
576
576
160 + 323 =A
85 + 132 =M
536 + 347 =G
167 + 121 =O
373 + 247 =E
221 + 248 =B
328 + 266 =R
464 + 358 =T
369 + 207 =F
439 + 331 =C
268 + 142 =L
239 + 330 =D
384 + 518 =H
313 + 502 =S
310 + 245 =I
0/15 letters found
Clue 4
Subtraction
Subtract the missing trail markers from the original total to find out how many remain. Solve this to get the fourth 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.
A
213
458
198
441
609
531
488
198
315
589
391
A
213
804
335
A
213
265
589
198
893
804
804
315
589
667
315
A
213
198
488
531
315
391
A
213
333
315
224 - 11 =A
705 - 264 =I
331 - 16 =E
616 - 351 =S
817 - 228 =D
690 - 299 =C
545 - 87 =B
730 - 395 =W
1064 - 260 =P
743 - 134 =G
805 - 274 =H
528 - 330 =R
1084 - 191 =O
916 - 249 =N
690 - 357 =V
588 - 100 =T
0/16 letters found
Clue 5
Division facts (1-12) — the last clue
Divide the remaining fruit rations equally among the search teams. Share them out to discover the 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
10 ÷ 10 = ?
42 ÷ 7 = ?
8 ÷ 4 = ?
54 ÷ 6 = ?
48 ÷ 6 = ?
28 ÷ 7 = ?
35 ÷ 5 = ?
12 ÷ 1 = ?
25 ÷ 5 = ?
10 ÷ 1 = ?
99 ÷ 9 = ?
Step 2 — cross out the sentence with each answer
1.The villain glided over the trees with a paraglider, then drank cold water from a water canteen.
2.The villain swung across the canyon with a grappling hook, then climbed down the cliff with a rope ladder.
3.The villain cut through thick vines with a laser torch, then drank cold water from a water canteen.
4.The villain checked the trail using a compass watch, then lit up the sky with a signal flare.
5.The villain cut through thick vines with a laser torch, then spotted footprints with night goggles.
6.The villain checked the trail using a compass watch, then marked the path on a map scroll.
7.The villain vanished in smoke using a smoke bomb, then climbed down the cliff with a rope ladder.
8.The villain glided over the trees with a paraglider, then marked the path on a map scroll.
9.The villain swung across the canyon with a grappling hook, then lit up the sky with a signal flare.
10.The villain cut through thick vines with a laser torch, then climbed down the cliff with a rope ladder.
11.The villain glided over the trees with a paraglider, then spotted footprints with night goggles.
12.The villain cut through thick vines with a laser torch, then lit up the sky with a signal flare.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — Mystery of the Lost Crystal Monkey
Culprit: Finn Forest (Laser Torch · Water Canteen · Right Handed · Red Cap · Flashlight Beam)
- Clue 1 (Multiplication facts (1-12)): "THE BANDIT DID NOT CARRY ANY SIGNAL FLARE"7 × 3 = 21 (T) · 11 × 12 = 132 (A) · 7 × 7 = 49 (D) · 7 × 12 = 84 (O) · 1 × 10 = 10 (L) · 1 × 4 = 4 (G) · 1 × 7 = 7 (S) · 7 × 6 = 42 (Y) · 11 × 4 = 44 (B) · 10 × 7 = 70 (R) · 12 × 4 = 48 (E) · 6 × 9 = 54 (C) · 2 × 11 = 22 (H) · 2 × 9 = 18 (N) · 7 × 8 = 56 (I) · 5 × 5 = 25 (F)
- Clue 2 (Rounding): "THE TRACKS SHOW RIGHT HANDED TOOL MARKS"Round 62 to the nearest ten = 60 (T) · Round 379 to the nearest hundred = 400 (E) · Round 5,485 to the nearest thousand = 5000 (H) · Round 52 to the nearest ten = 50 (G) · Round 529 to the nearest hundred = 500 (M) · Round 857 to the nearest hundred = 900 (S) · Round 3,707 to the nearest thousand = 4000 (L) · Round 16 to the nearest ten = 20 (W) · Round 231 to the nearest hundred = 200 (A) · Round 565 to the nearest hundred = 600 (D) · Round 8,407 to the nearest thousand = 8000 (I) · Round 6,345 to the nearest thousand = 6000 (K) · Round 3,432 to the nearest thousand = 3000 (O) · Round 8,987 to the nearest thousand = 9000 (R) · Round 26 to the nearest ten = 30 (C) · Round 79 to the nearest ten = 80 (N)
- Clue 3 (Addition): "A BRIGHT FLASHLIGHT BEAM SCARED THEM OFF"160 + 323 = 483 (A) · 85 + 132 = 217 (M) · 536 + 347 = 883 (G) · 167 + 121 = 288 (O) · 373 + 247 = 620 (E) · 221 + 248 = 469 (B) · 328 + 266 = 594 (R) · 464 + 358 = 822 (T) · 369 + 207 = 576 (F) · 439 + 331 = 770 (C) · 268 + 142 = 410 (L) · 239 + 330 = 569 (D) · 384 + 518 = 902 (H) · 313 + 502 = 815 (S) · 310 + 245 = 555 (I)
- Clue 4 (Subtraction): "A BRIGHT RED CAP WAS DROPPED NEAR THE CAVE"224 - 11 = 213 (A) · 705 - 264 = 441 (I) · 331 - 16 = 315 (E) · 616 - 351 = 265 (S) · 817 - 228 = 589 (D) · 690 - 299 = 391 (C) · 545 - 87 = 458 (B) · 730 - 395 = 335 (W) · 1064 - 260 = 804 (P) · 743 - 134 = 609 (G) · 805 - 274 = 531 (H) · 528 - 330 = 198 (R) · 1084 - 191 = 893 (O) · 916 - 249 = 667 (N) · 690 - 357 = 333 (V) · 588 - 100 = 488 (T)
- Clue 5 (Division facts (1-12)): surviving statement (box 3) → Finn Forest10 ÷ 10 = 1 · 42 ÷ 7 = 6 · 8 ÷ 4 = 2 · 54 ÷ 6 = 9 · 48 ÷ 6 = 8 · 28 ÷ 7 = 4 · 35 ÷ 5 = 7 · 12 ÷ 1 = 12 · 25 ÷ 5 = 5 · 10 ÷ 1 = 10 · 99 ÷ 9 = 11
About this mystery
- Grade level
- Grade 3 math
- Math topics
- Multiplication, Rounding, Addition, Subtraction, Division
- Reading level
- grades 3-4
- Theme
- Mystery of the Lost Crystal Monkey — set in Misty Island Jungle
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects