Grade 4Reading: grades 3-4RoundingAdditionSubtractionMultiplicationDivision
The Lost Ruby Monkey
The golden vault of the Whispering Jungle Temple has been opened! Someone slipped past the stone traps and snatched the legendary Ruby Monkey. The Head Archeologist needs your help. Look at the clues, solve the math mysteries, and find out which explorer went rogue!
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 | Adventure Skill | Backpack Gear | Swinging Arm | Hair Style | Silly Weakness |
|---|---|---|---|---|---|
| Leo | Map Reader | Super Canteen | Right-handed swing | Curly black hair | Afraid of spiders |
| Zoe | Beast Whisperer | Pocket Slingshot | Left-handed swing | Spiky brown hair | Afraid of spiders |
| Lara | Grappling Hook | Magnifying Glass | Left-handed swing | Curly black hair | Sneeze from pollen |
| Rex | Grappling Hook | Pocket Slingshot | Right-handed swing | Curly black hair | Afraid of spiders |
| Lily | Temple Runner | Pocket Slingshot | Left-handed swing | Curly black hair | Tickled by feathers |
| Ben | Beast Whisperer | Glow Lantern | Left-handed swing | Curly black hair | Afraid of spiders |
| Mia | Grappling Hook | Golden Compass | Right-handed swing | Curly black hair | Sneeze from pollen |
| Cleo | Beast Whisperer | Super Canteen | Right-handed swing | Spiky brown hair | Afraid of spiders |
| Max | Map Reader | Glow Lantern | Right-handed swing | Spiky brown hair | Afraid of spiders |
| Maya | Beast Whisperer | Magnifying Glass | Right-handed swing | Curly black hair | Afraid of spiders |
| Finn | Temple Runner | Super Canteen | Right-handed swing | Curly black hair | Afraid of spiders |
| Otis | Grappling Hook | Super Canteen | Right-handed swing | Curly black hair | Tickled by feathers |
| Sam | Grappling Hook | Golden Compass | Left-handed swing | Spiky brown hair | Afraid of spiders |
| Amy | Beast Whisperer | Super Canteen | Left-handed swing | Ponytail red hair | Tickled by feathers |
| Ruby | Vine Swinger | Golden Compass | Left-handed swing | Spiky brown hair | Tickled by feathers |
| Kai | Map Reader | Magnifying Glass | Left-handed swing | Spiky brown hair | Tickled by feathers |
| Ella | Vine Swinger | Pocket Slingshot | Right-handed swing | Curly black hair | Afraid of spiders |
| Toby | Beast Whisperer | Magnifying Glass | Left-handed swing | Spiky brown hair | Sneeze from pollen |
| Hugo | Beast Whisperer | Golden Compass | Left-handed swing | Spiky brown hair | Afraid of spiders |
| Ivy | Grappling Hook | Golden Compass | Right-handed swing | Spiky brown hair | Sneeze from pollen |
| Nova | Beast Whisperer | Golden Compass | Left-handed swing | Ponytail red hair | Sneeze from pollen |
Clue 1
Rounding
Your high-tech jungle radar can estimate distances, but it only shows numbers rounded to the nearest ten. Round the radar readings to 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.
T
9000
2300
130
2900
3000
700
700
70
3000
370
2000
230
130
900
370
230
T
9000
2300
70
2900
130
70
1300
70
30
370
3000
170
300
3000
370
30
30
700
70
900
900
Round 8,559 to the nearest thousandT
Round 862 to the nearest hundredS
Round 2,576 to the nearest thousandI
Round 29 to the nearest tenG
Round 173 to the nearest tenF
Round 132 to the nearest tenE
Round 265 to the nearest hundredY
Round 71 to the nearest tenA
Round 229 to the nearest tenO
Round 2,269 to the nearest hundredH
Round 743 to the nearest hundredL
Round 370 to the nearest tenN
Round 2,394 to the nearest thousandD
Round 1,306 to the nearest hundredM
Round 2,890 to the nearest hundredV
0/15 letters found
Clue 2
Addition
To cross the crocodile river, you must step on the stone paths. Add up the numbers carved into the safe stepping stones to find your 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
6986
8380
2452
T
6986
8380
2739
2452
3175
7405
9330
2906
5859
4700
2906
8927
9330
2077
8743
5269
2906
7405
2739
5859
4700
T
6986
8380
2452
8743
2739
4700
8380
T
6986
8380
2077
5859
5269
2634 + 4352 =T
5636 + 3694 =W
2118 + 3151 =D
1517 + 1222 =I
3744 + 2115 =N
1108 + 1344 =E
2960 + 5967 =P
1227 + 1948 =F
3135 + 4270 =S
2201 + 2499 =G
2000 + 906 =U
4937 + 3806 =R
631 + 1446 =A
5490 + 2890 =H
0/14 letters found
Clue 3
Subtraction
You find a bag of trail mix dropped by the thief. Subtract the spilled crumbs from the original total to see which way they ran.
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
6724
1380
2035
3027
1937
7262
2665
W
6724
1380
2440
8375
2440
1937
5757
5757
7844
1380
5757
7844
3766
1380
2035
8736
5305
7262
5305
W
6724
5305
7775
8375
1341
5305
8736
1380
2665
9795 - 3071 =W
4062 - 2682 =E
9225 - 489 =R
8129 - 354 =Y
7775 - 2018 =T
7781 - 4015 =I
9895 - 1520 =S
6923 - 4258 =D
3689 - 1654 =F
6646 - 3619 =O
9720 - 1876 =H
4931 - 3590 =C
3360 - 1423 =U
10290 - 4985 =A
11799 - 4537 =N
2945 - 505 =B
0/16 letters found
Clue 4
Multiplication facts (1-12)
A wall of locked stone buttons stands before you. Multiply the number of rows by columns to press the right code and open the clue box.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
C
60
48
90
5
2
25
5
121
C
60
16
7
27
90
121
44
1
7
77
72
90
72
5
72
21
27
40
44
27
22
72
25
90
121
44
C
60
22
12 × 5 =C
6 × 8 =U
4 × 4 =K
1 × 7 =S
3 × 9 =T
11 × 2 =H
5 × 1 =L
1 × 1 =D
5 × 5 =B
10 × 9 =R
6 × 12 =E
7 × 3 =F
5 × 8 =O
11 × 11 =A
7 × 11 =W
2 × 1 =Y
4 × 11 =N
0/17 letters found
Clue 5
Division facts (1-12) — the last clue
You find a bundle of jungle vines. If you divide the vine evenly among your search team, the leftovers will point to the final secret.
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
60 ÷ 10 = ?
35 ÷ 5 = ?
3 ÷ 1 = ?
10 ÷ 10 = ?
50 ÷ 10 = ?
54 ÷ 6 = ?
10 ÷ 1 = ?
32 ÷ 4 = ?
4 ÷ 1 = ?
2 ÷ 1 = ?
44 ÷ 4 = ?
Step 2 — cross out the sentence with each answer
1.The villain whispered to the temple panthers to pass safely, then shot a target with a pocket slingshot.
2.The villain whispered to the temple panthers to pass safely, then followed the golden compass north.
3.The villain used a grappling hook to climb the wall, then shot a target with a pocket slingshot.
4.The villain read the ancient map to bypass the maze, then examined the small hidden lever with a magnifying glass.
5.The villain dashed past the rolling boulder traps, then lit up the dark tunnel with a glow lantern.
6.The villain swung across the deep pit on a wild vine, then shot a target with a pocket slingshot.
7.The villain read the ancient map to bypass the maze, then drank cold water from a super canteen.
8.The villain swung across the deep pit on a wild vine, then drank cold water from a super canteen.
9.The villain read the ancient map to bypass the maze, then lit up the dark tunnel with a glow lantern.
10.The villain whispered to the temple panthers to pass safely, then lit up the dark tunnel with a glow lantern.
11.The villain dashed past the rolling boulder traps, then followed the golden compass north.
12.The villain dashed past the rolling boulder traps, then drank cold water from a super canteen.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Lost Ruby Monkey
Culprit: Finn (Temple Runner · Super Canteen · Right-handed swing · Curly black hair · Afraid of spiders)
- Clue 1 (Rounding): "THE VILLAIN DOES NOT HAVE A MAGNIFYING GLASS"Round 8,559 to the nearest thousand = 9000 (T) · Round 862 to the nearest hundred = 900 (S) · Round 2,576 to the nearest thousand = 3000 (I) · Round 29 to the nearest ten = 30 (G) · Round 173 to the nearest ten = 170 (F) · Round 132 to the nearest ten = 130 (E) · Round 265 to the nearest hundred = 300 (Y) · Round 71 to the nearest ten = 70 (A) · Round 229 to the nearest ten = 230 (O) · Round 2,269 to the nearest hundred = 2300 (H) · Round 743 to the nearest hundred = 700 (L) · Round 370 to the nearest ten = 370 (N) · Round 2,394 to the nearest thousand = 2000 (D) · Round 1,306 to the nearest hundred = 1300 (M) · Round 2,890 to the nearest hundred = 2900 (V)
- Clue 2 (Addition): "THE THIEF SWUNG UPWARD USING THE RIGHT HAND"2634 + 4352 = 6986 (T) · 5636 + 3694 = 9330 (W) · 2118 + 3151 = 5269 (D) · 1517 + 1222 = 2739 (I) · 3744 + 2115 = 5859 (N) · 1108 + 1344 = 2452 (E) · 2960 + 5967 = 8927 (P) · 1227 + 1948 = 3175 (F) · 3135 + 4270 = 7405 (S) · 2201 + 2499 = 4700 (G) · 2000 + 906 = 2906 (U) · 4937 + 3806 = 8743 (R) · 631 + 1446 = 2077 (A) · 5490 + 2890 = 8380 (H)
- Clue 3 (Subtraction): "WE FOUND WEBS BUT THE THIEF RAN AWAY SCARED"9795 - 3071 = 6724 (W) · 4062 - 2682 = 1380 (E) · 9225 - 489 = 8736 (R) · 8129 - 354 = 7775 (Y) · 7775 - 2018 = 5757 (T) · 7781 - 4015 = 3766 (I) · 9895 - 1520 = 8375 (S) · 6923 - 4258 = 2665 (D) · 3689 - 1654 = 2035 (F) · 6646 - 3619 = 3027 (O) · 9720 - 1876 = 7844 (H) · 4931 - 3590 = 1341 (C) · 3360 - 1423 = 1937 (U) · 10290 - 4985 = 5305 (A) · 11799 - 4537 = 7262 (N) · 2945 - 505 = 2440 (B)
- Clue 4 (Multiplication facts (1-12)): "CURLY BLACK STRANDS WERE LEFT ON THE BRANCH"12 × 5 = 60 (C) · 6 × 8 = 48 (U) · 4 × 4 = 16 (K) · 1 × 7 = 7 (S) · 3 × 9 = 27 (T) · 11 × 2 = 22 (H) · 5 × 1 = 5 (L) · 1 × 1 = 1 (D) · 5 × 5 = 25 (B) · 10 × 9 = 90 (R) · 6 × 12 = 72 (E) · 7 × 3 = 21 (F) · 5 × 8 = 40 (O) · 11 × 11 = 121 (A) · 7 × 11 = 77 (W) · 2 × 1 = 2 (Y) · 4 × 11 = 44 (N)
- Clue 5 (Division facts (1-12)): surviving statement (box 12) → Finn60 ÷ 10 = 6 · 35 ÷ 5 = 7 · 3 ÷ 1 = 3 · 10 ÷ 10 = 1 · 50 ÷ 10 = 5 · 54 ÷ 6 = 9 · 10 ÷ 1 = 10 · 32 ÷ 4 = 8 · 4 ÷ 1 = 4 · 2 ÷ 1 = 2 · 44 ÷ 4 = 11
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Rounding, Addition, Subtraction, Multiplication, Division
- Reading level
- grades 3-4
- Theme
- The Lost Ruby Monkey — set in The Whispering Jungle Temple
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects