Math Mysteries
Grade 4Reading: grades 3-4Place valueAdditionSubtractionMultiplicationDivision

The Lost Monkey Gold

The Golden Monkey Statue has vanished from the Whispering Jungle camp! Chief Archeologist Wendy needs your help. A mysterious Masked Thief snatched the relic in the middle of the night. Follow the clues, solve the math puzzles, and unmask the thief before they escape!

Suspects

Possible suspects

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

21 of 21 still in play
NameJungle ToolSecret SkillBelt TypeHat ColorFear
Kit Keenmagnifying glassmap readingleather beltpith helmetfear of water
Ellie Expeditionmachetemap readingleather beltred bandanafear of spiders
Nellie Navigatorgrappling hooksilent steppingleather beltpith helmetfear of heights
River Rangermagnifying glasssilent steppingleather beltred bandanafear of spiders
Cleo Compassbinocularsvine swingingleather beltpith helmetfear of spiders
Hunter Hawkmachetequick climbingleather beltpith helmetfear of spiders
Monty Mapbinocularsanimal mimicryleather beltpith helmetfear of spiders
Lara Lostgrappling hookquick climbingrope beltred bandanafear of spiders
Jungle Jackmagnifying glassanimal mimicryrope beltpith helmetfear of spiders
Barnaby Bootsgrappling hookquick climbingrope beltpith helmetfear of heights
Alex Explorerbinocularsquick climbingleather beltred bandanafear of spiders
Danny Daringmachetesilent steppingrope beltred bandanafear of water
Forrest Findergrappling hookmap readingrope beltgreen capfear of water
Uma Underhillmagnifying glasssilent steppingrope beltgreen capfear of heights
Tracker Tomclimbing ropequick climbingleather beltgreen capfear of spiders
Wilder Wyattclimbing ropeanimal mimicryrope beltred bandanafear of spiders
Penny Pathfindergrappling hookvine swingingleather beltpith helmetfear of spiders
Val Valleymagnifying glasssilent steppingleather beltpith helmetfear of spiders
Oakley Outpostgrappling hookquick climbingleather beltgreen capfear of water
Indie Jonesgrappling hookmap readingrope beltpith helmetfear of spiders
Quincy Quickmagnifying glasssilent steppingrope beltgreen capfear of water
Clue 1

Place value

You find a mysterious locked trunk in the explorer camp. To crack the code, you must figure out the value of the digit in the hundreds place. This clue reveals the thief's secret skill!

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
30
40
4000
T
30
40
400
4000
300
900
3000
70
70
500
T
30
800
500
60
1000
400
900
7000
900
2000
400
100
50
400
70
9000
What is the value of the 3 in 8,036?T
What is the value of the 1 in 1,242?U
What is the value of the 4 in 3,490?I
What is the value of the 7 in 7,890?K
What is the value of the 4 in 8,240?H
What is the value of the 9 in 19,133?G
What is the value of the 4 in 74,979?E
What is the value of the 3 in 2,375?F
What is the value of the 5 in 4,572?O
What is the value of the 9 in 975?C
What is the value of the 8 in 873?D
What is the value of the 7 in 373?N
What is the value of the 3 in 3,961?A
What is the value of the 6 in 4,262?Q
What is the value of the 5 in 654?B
What is the value of the 2 in 42,688?L
What is the value of the 1 in 153?M
0/17 letters found
Clue 2

Addition

A friendly monkey points to a pile of golden bananas. If you add up all the bananas in the three trees, you will find the path. Solving this sum shows what the thief dropped!

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
2715
2386
9003
4355
9142
4355
3359
9003
9114
T
2715
4905
9003
7805
8092
4355
7805
5350
9003
7805
T
2715
2386
9003
8092
9264
9003
5350
T
2715
1659 + 1056 =T
1328 + 1058 =H
3784 + 4308 =R
1706 + 3644 =L
2084 + 1275 =P
3116 + 4689 =A
3869 + 5395 =B
2482 + 1873 =S
6333 + 2781 =C
2129 + 2776 =W
4188 + 4954 =U
5667 + 3336 =E
0/12 letters found
Clue 3

Subtraction

The camp's water canteen is leaking fast! You need to subtract the spilled water to see how much is left for your journey. The answer uncovers the thief's biggest fear!

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
6622
8416
6289
6657
6342
4392
4392
6567
6342
7114
7140
6567
7114
6567
1332
6567
8352
4699
7140
5231
5122
6567
6518
7395
6342
3921
6289
7140
8968 - 2346 =T
8361 - 1794 =A
11061 - 4772 =E
9572 - 1156 =H
10802 - 3688 =N
8879 - 4958 =D
1477 - 145 =W
9489 - 4367 =M
9149 - 2009 =R
6482 - 1783 =F
7383 - 726 =V
10515 - 3997 =S
8715 - 363 =Y
8497 - 1102 =P
4570 - 178 =L
9856 - 4625 =O
8923 - 2581 =I
0/17 letters found
Clue 4

Multiplication facts (1-12)

You reach a massive wall made of square stone blocks. By multiplying the rows of blocks by the columns, you can find the hidden door. The result reveals what kind of belt the thief wears!

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
42
100
18
11
10
24
6
70
81
8
80
12
12
100
64
96
100
80
70
80
80
12
100
15
70
96
81
7 × 6 =W
10 × 8 =T
4 × 3 =H
10 × 10 =E
7 × 10 =A
2 × 3 =D
9 × 9 =P
5 × 3 =C
8 × 12 =M
5 × 2 =U
8 × 8 =L
3 × 6 =F
12 × 2 =N
1 × 11 =O
1 × 8 =I
0/15 letters found
Clue 5

Division facts (1-12) — the last clue

The rescue team has a pack of trail mix to share. Divide the treats equally among the five brave adventurers to keep up your energy. The final answer tells you what tool the thief carried!

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
30 ÷ 5 = ?
45 ÷ 9 = ?
11 ÷ 1 = ?
50 ÷ 5 = ?
72 ÷ 6 = ?
3 ÷ 3 = ?
10 ÷ 5 = ?
56 ÷ 7 = ?
21 ÷ 3 = ?
18 ÷ 6 = ?
18 ÷ 2 = ?
Step 2 — cross out the sentence with each answer
1.The villain uses a climbing rope to scale the ruins, then howls like a jaguar to scare the guards.
2.The villain throws a grappling hook over the wall, then howls like a jaguar to scare the guards.
3.The villain throws a grappling hook over the wall, then scrambles up the tallest tree in seconds.
4.The villain scans the trees with binoculars, then howls like a jaguar to scare the guards.
5.The villain examines footprints with a magnifying glass, then slips through the grass without a sound.
6.The villain throws a grappling hook over the wall, then swings across the river on a wild vine.
7.The villain scans the trees with binoculars, then slips through the grass without a sound.
8.The villain uses a machete to clear a path, then checks the old parchment to find the path.
9.The villain uses a climbing rope to scale the ruins, then slips through the grass without a sound.
10.The villain uses a climbing rope to scale the ruins, then scrambles up the tallest tree in seconds.
11.The villain scans the trees with binoculars, then swings across the river on a wild vine.
12.The villain scans the trees with binoculars, then checks the old parchment to find the path.
Solve it

Name the culprit

Choose the one suspect left standing.

About this mystery

Grade level
Grade 4 math
Math topics
Place value, Addition, Subtraction, Multiplication, Division
Reading level
grades 3-4
Theme
The Lost Monkey Gold — set in The Whispering Jungle
Format
Interactive online & printable worksheet with answer key
Solution
One unique, verified culprit among 21 suspects

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