Grade 4Reading: grades 3-4RoundingAdditionSubtractionMultiplicationDivision
The Lost Temple Mystery
A rogue explorer has snuck into the Lost Temple of the Golden Monkey and stolen the legendary golden banana trophy! The Chief Archaeologist needs your help to track down the thief and recover the artifact. Use your math skills to decode the clues left behind!
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 | Artifact | Dominant Hand | Hair Color | Fear |
|---|---|---|---|---|---|
| Noah | rope ladder | secret diary | left-handed | brown hair | dislikes muddy paths |
| Ruby | magnifying glass | secret diary | right-handed | brown hair | scared of heights |
| Sam | grappling hook | ruby key | left-handed | blonde hair | scared of heights |
| Lily | machete | secret diary | right-handed | black hair | dislikes muddy paths |
| Isla | magnifying glass | secret diary | right-handed | black hair | dislikes muddy paths |
| Sophia | metal detector | golden compass | right-handed | black hair | dislikes muddy paths |
| Leo | rope ladder | ruby key | right-handed | blonde hair | afraid of spiders |
| Olivia | rope ladder | bronze coin | right-handed | blonde hair | dislikes muddy paths |
| Toby | metal detector | ruby key | right-handed | black hair | dislikes muddy paths |
| Benny | metal detector | bronze coin | right-handed | black hair | afraid of spiders |
| Grace | rope ladder | secret diary | right-handed | black hair | scared of heights |
| Mia | metal detector | ancient map | right-handed | brown hair | afraid of spiders |
| Zoe | machete | ruby key | right-handed | black hair | dislikes muddy paths |
| Alex | metal detector | golden compass | right-handed | blonde hair | dislikes muddy paths |
| Peter | machete | ruby key | left-handed | black hair | dislikes muddy paths |
| Max | machete | secret diary | right-handed | blonde hair | dislikes muddy paths |
| Henry | machete | bronze coin | left-handed | black hair | afraid of spiders |
| Felix | magnifying glass | ancient map | right-handed | black hair | afraid of spiders |
| Katie | magnifying glass | ruby key | right-handed | brown hair | afraid of spiders |
| Emma | magnifying glass | ancient map | left-handed | brown hair | dislikes muddy paths |
| Chloe | metal detector | ancient map | right-handed | brown hair | dislikes muddy paths |
Clue 1
Rounding
Your team finds a rusty temple scale. It only measures weight to the nearest ten pounds. Round the weights of your supply bags to find the secret path.
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
430
170
3700
300
5000
200
200
110
5000
500
2300
1100
3700
50
500
1100
T
430
170
110
300
3700
T
430
170
3700
90
1100
200
2300
3700
500
3000
1100
900
1700
110
50
50
Round 426 to the nearest tenT
Round 51 to the nearest tenS
Round 528 to the nearest hundredN
Round 1,740 to the nearest hundredP
Round 168 to the nearest tenH
Round 303 to the nearest hundredV
Round 900 to the nearest hundredM
Round 87 to the nearest tenG
Round 227 to the nearest hundredL
Round 5,357 to the nearest thousandI
Round 1,123 to the nearest hundredO
Round 3,715 to the nearest hundredE
Round 2,343 to the nearest hundredD
Round 3,209 to the nearest thousandC
Round 111 to the nearest tenA
0/15 letters found
Clue 2
Addition
To unlock the heavy stone door, you must add up the total number of carved monkey statues along the temple walls.
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
2646
8976
8427
3108
9214
9307
9307
7355
9214
5454
3928
6538
7355
9031
9031
8427
8864
T
2646
8976
8427
6603
8302
4300
2676
9214
T
2646
8976
T
2646
8976
8427
6538
9214
3928
8976
T
2646
8976
7355
5454
8864
1244 + 1402 =T
3443 + 3912 =A
1434 + 1242 =W
1431 + 1677 =V
3303 + 3300 =C
3605 + 4822 =E
4105 + 5109 =I
4052 + 4250 =U
1484 + 2816 =P
2305 + 1623 =G
5316 + 3548 =D
4164 + 4812 =H
3473 + 1981 =N
3602 + 2936 =R
3500 + 5531 =B
2841 + 6466 =L
0/16 letters found
Clue 3
Subtraction
A giant boulder blocked the path, but the villain used some dynamite. Subtract the weight of the debris to see how much of the trail is clear.
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
3724
2511
3729
2718
3307
2046
2046
1366
3307
2795
3010
1544
3294
2046
2040
2795
1544
T
3724
3010
1366
2046
3642
3307
2795
T
3724
2511
3729
3010
3729
T
3724
5854
3294
2040
7029 - 3305 =T
7396 - 4102 =U
7028 - 4018 =W
6775 - 921 =M
2514 - 1148 =A
5231 - 2436 =N
4930 - 2212 =V
3781 - 139 =K
2872 - 826 =L
3322 - 15 =I
6341 - 3830 =H
2987 - 1443 =O
7092 - 3363 =E
6111 - 4071 =D
0/14 letters found
Clue 4
Multiplication facts (1-12)
You find rows of glowing beetle gems on the wall. Multiply the number of rows by the beetles in each row to solve the lock puzzle.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
S
96
32
144
28
42
10
48
120
70
7
48
2
60
4
48
S
96
10
28
8
16
32
9
16
7
28
16
28
144
27
10
28
4
48
10
10
12 × 8 =S
7 × 1 =H
4 × 7 =E
2 × 1 =I
4 × 2 =F
6 × 10 =R
12 × 12 =M
3 × 3 =N
4 × 8 =O
10 × 7 =K
6 × 7 =B
2 × 2 =W
2 × 8 =T
9 × 3 =P
12 × 10 =C
2 × 5 =L
8 × 6 =A
0/17 letters found
Clue 5
Division facts (1-12) — the last clue
To escape the temple, you must share the crystal keys equally among your team members. Divide the total keys to find your path out.
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
6 ÷ 2 = ?
24 ÷ 2 = ?
30 ÷ 5 = ?
33 ÷ 3 = ?
12 ÷ 6 = ?
20 ÷ 2 = ?
5 ÷ 5 = ?
63 ÷ 7 = ?
10 ÷ 2 = ?
7 ÷ 1 = ?
88 ÷ 11 = ?
Step 2 — cross out the sentence with each answer
1.The villain climbs up the stone wall with a rope ladder, then scribbles notes in a secret diary.
2.The villain searches the sandy floor with a metal detector, then finds north using a golden compass.
3.The villain clears the thick vines with a machete, then unlocks the stone chest with a ruby key.
4.The villain clears the thick vines with a machete, then scribbles notes in a secret diary.
5.The villain climbs up the stone wall with a rope ladder, then unlocks the stone chest with a ruby key.
6.The villain examines the ancient writing with a magnifying glass, then scribbles notes in a secret diary.
7.The villain swings across the canyon with a grappling hook, then scribbles notes in a secret diary.
8.The villain clears the thick vines with a machete, then places a bronze coin into the hidden slot.
9.The villain examines the ancient writing with a magnifying glass, then checks the directions on an ancient map.
10.The villain examines the ancient writing with a magnifying glass, then finds north using a golden compass.
11.The villain swings across the canyon with a grappling hook, then unlocks the stone chest with a ruby key.
12.The villain searches the sandy floor with a metal detector, then unlocks the stone chest with a ruby key.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Lost Temple Mystery
Culprit: Lily (machete · secret diary · right-handed · black hair · dislikes muddy paths)
- Clue 1 (Rounding): "THE VILLAIN DOES NOT HAVE THE GOLDEN COMPASS"Round 426 to the nearest ten = 430 (T) · Round 51 to the nearest ten = 50 (S) · Round 528 to the nearest hundred = 500 (N) · Round 1,740 to the nearest hundred = 1700 (P) · Round 168 to the nearest ten = 170 (H) · Round 303 to the nearest hundred = 300 (V) · Round 900 to the nearest hundred = 900 (M) · Round 87 to the nearest ten = 90 (G) · Round 227 to the nearest hundred = 200 (L) · Round 5,357 to the nearest thousand = 5000 (I) · Round 1,123 to the nearest hundred = 1100 (O) · Round 3,715 to the nearest hundred = 3700 (E) · Round 2,343 to the nearest hundred = 2300 (D) · Round 3,209 to the nearest thousand = 3000 (C) · Round 111 to the nearest ten = 110 (A)
- Clue 2 (Addition): "THE VILLAIN GRABBED THE CUP WITH THE RIGHT HAND"1244 + 1402 = 2646 (T) · 3443 + 3912 = 7355 (A) · 1434 + 1242 = 2676 (W) · 1431 + 1677 = 3108 (V) · 3303 + 3300 = 6603 (C) · 3605 + 4822 = 8427 (E) · 4105 + 5109 = 9214 (I) · 4052 + 4250 = 8302 (U) · 1484 + 2816 = 4300 (P) · 2305 + 1623 = 3928 (G) · 5316 + 3548 = 8864 (D) · 4164 + 4812 = 8976 (H) · 3473 + 1981 = 5454 (N) · 3602 + 2936 = 6538 (R) · 3500 + 5531 = 9031 (B) · 2841 + 6466 = 9307 (L)
- Clue 3 (Subtraction): "THE VILLAIN WOULD NOT WALK IN THE WET MUD"7029 - 3305 = 3724 (T) · 7396 - 4102 = 3294 (U) · 7028 - 4018 = 3010 (W) · 6775 - 921 = 5854 (M) · 2514 - 1148 = 1366 (A) · 5231 - 2436 = 2795 (N) · 4930 - 2212 = 2718 (V) · 3781 - 139 = 3642 (K) · 2872 - 826 = 2046 (L) · 3322 - 15 = 3307 (I) · 6341 - 3830 = 2511 (H) · 2987 - 1443 = 1544 (O) · 7092 - 3363 = 3729 (E) · 6111 - 4071 = 2040 (D)
- Clue 4 (Multiplication facts (1-12)): "SOME BLACK HAIR WAS LEFT ON THE TEMPLE WALL"12 × 8 = 96 (S) · 7 × 1 = 7 (H) · 4 × 7 = 28 (E) · 2 × 1 = 2 (I) · 4 × 2 = 8 (F) · 6 × 10 = 60 (R) · 12 × 12 = 144 (M) · 3 × 3 = 9 (N) · 4 × 8 = 32 (O) · 10 × 7 = 70 (K) · 6 × 7 = 42 (B) · 2 × 2 = 4 (W) · 2 × 8 = 16 (T) · 9 × 3 = 27 (P) · 12 × 10 = 120 (C) · 2 × 5 = 10 (L) · 8 × 6 = 48 (A)
- Clue 5 (Division facts (1-12)): surviving statement (box 4) → Lily6 ÷ 2 = 3 · 24 ÷ 2 = 12 · 30 ÷ 5 = 6 · 33 ÷ 3 = 11 · 12 ÷ 6 = 2 · 20 ÷ 2 = 10 · 5 ÷ 5 = 1 · 63 ÷ 7 = 9 · 10 ÷ 2 = 5 · 7 ÷ 1 = 7 · 88 ÷ 11 = 8
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Rounding, Addition, Subtraction, Multiplication, Division
- Reading level
- grades 3-4
- Theme
- The Lost Temple Mystery — set in The Lost Temple of the Golden Monkey
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects