Grade 4Reading: grades 5-6MultiplicationSkip countingRoundingAdditionDivision
The Secret of Sunken Temple
Someone snuck into the Expedition Basecamp and snatched the Golden Sun Compass! Examine the evidence and solve the math clues to identify the suspect.
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 | Primary Tool | Special Gear | Carrying Style | Bandana Color | Feared Creature |
|---|---|---|---|---|---|
| Charles Darwin | Compass Rose | Climbing Boots | Right Handed | Green Bandana | Cave Spiders |
| Edmund Hillary | Machete Blade | Signal Flare | Left Handed | Green Bandana | Golden Bats |
| Nellie Bly | Brass Scope | Leather Satchel | Left Handed | Red Bandana | Golden Bats |
| Percy Fawcett | Torch Lantern | Heavy Canteen | Left Handed | Blue Bandana | Golden Bats |
| Sylvia Earle | Grappling Hook | Rope Ladder | Left Handed | Red Bandana | Golden Bats |
| Freya Stark | Torch Lantern | Heavy Canteen | Right Handed | Blue Bandana | Golden Bats |
| Ranulph Fiennes | Torch Lantern | Heavy Canteen | Right Handed | Green Bandana | Mud Leeches |
| Mary Kingsley | Grappling Hook | Signal Flare | Right Handed | Blue Bandana | Mud Leeches |
| Ernest Shackleton | Torch Lantern | Signal Flare | Left Handed | Red Bandana | Golden Bats |
| Nathan Drake | Grappling Hook | Leather Satchel | Left Handed | Blue Bandana | Golden Bats |
| Sacagawea | Torch Lantern | Leather Satchel | Left Handed | Blue Bandana | Cave Spiders |
| Gertrude Bell | Compass Rose | Rope Ladder | Left Handed | Red Bandana | Mud Leeches |
| Ibn Battuta | Compass Rose | Leather Satchel | Left Handed | Blue Bandana | Golden Bats |
| Amelia Earhart | Grappling Hook | Leather Satchel | Right Handed | Green Bandana | Cave Spiders |
| Harriet Chalmers | Compass Rose | Climbing Boots | Right Handed | Green Bandana | Mud Leeches |
| Jacques Cousteau | Brass Scope | Heavy Canteen | Right Handed | Green Bandana | Cave Spiders |
| Roy Chapman | Torch Lantern | Leather Satchel | Left Handed | Red Bandana | Golden Bats |
| Indiana Jones | Machete Blade | Rope Ladder | Left Handed | Green Bandana | Mud Leeches |
| Hiram Bingham | Grappling Hook | Heavy Canteen | Right Handed | Blue Bandana | Cave Spiders |
| Lara Croft | Grappling Hook | Heavy Canteen | Left Handed | Red Bandana | Golden Bats |
| Marco Polo | Machete Blade | Climbing Boots | Right Handed | Red Bandana | Golden Bats |
Clue 1
Multiplication facts (1-12)
The team found crates of supplies stacked in equal rows near the temple gate. Calculate the total supplies to reveal 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
4
56
120
88
70
120
110
40
12
3
12
70
45
T
4
9
88
120
110
88
3
63
70
110
90
27
90
110
72
120
1 × 4 =T
9 × 5 =O
1 × 12 =D
10 × 11 =A
3 × 9 =F
4 × 10 =K
3 × 1 =I
9 × 8 =R
7 × 9 =G
8 × 11 =S
10 × 7 =N
7 × 8 =H
9 × 10 =L
12 × 10 =E
1 × 9 =U
0/15 letters found
Clue 2
Skip counting
Mystic stepping stones cross the swamp in a repeating number pattern. Follow the pattern to unlock the next 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
9
110
15
24
55
140
140
60
35
40
T
9
60
65
24
45
80
42
110
33
T
9
40
15
140
80
65
26
T
9
60
15
16
8
65
8
Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15T
Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12D
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, ___, 26, 28C
Skip-count by 5s. Fill the blank: 5, 10, ___, 20, 25A
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130R
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20N
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48P
Skip-count by 10s. Fill the blank: 10, 20, 30, ___, 50, 60W
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65K
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, ___, 65, 70H
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39I
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160S
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30F
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45O
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75E
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100L
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55U
0/17 letters found
Clue 3
Rounding
An ancient temple door mechanism only registers whole thousands on its weight dial. Round the measurement to open the latch.
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
300
370
50
290
7000
1300
230
50
900
9000
50
1700
900
290
7000
90
T
300
370
50
1300
7000
9000
1700
50
5000
3700
2000
T
300
700
Round 323 to the nearest hundredT
Round 8,520 to the nearest thousandL
Round 367 to the nearest tenH
Round 52 to the nearest tenE
Round 903 to the nearest hundredF
Round 1,261 to the nearest hundredG
Round 6,910 to the nearest thousandO
Round 732 to the nearest hundredS
Round 294 to the nearest tenR
Round 233 to the nearest tenU
Round 94 to the nearest tenM
Round 1,673 to the nearest hundredD
Round 5,439 to the nearest thousandN
Round 1,986 to the nearest thousandA
Round 3,680 to the nearest hundredB
0/15 letters found
Clue 4
Addition
The camp logbook shows rations gathered over several days. Add the daily totals together to find where the thief went.
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
2830
4210
3834
3932
4443
3932
9542
6629
2151
A
2830
4443
6629
A
2830
4443
A
2830
7770
4210
3932
A
2830
9387
5006
A
2830
7770
6629
3932
3834
9387
9387
9542
6629
1687 + 1143 =A
5246 + 2524 =S
1338 + 3105 =N
5965 + 3422 =P
1379 + 2553 =R
5252 + 4290 =E
1325 + 826 =B
2477 + 1733 =T
1525 + 2309 =O
1728 + 3278 =W
3464 + 3165 =D
0/11 letters found
Clue 5
Division facts (1-12) — the last clue
The explorers must split the remaining energy crystals equally among their packs. Solve the division to uncover the final trace.
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
14 ÷ 7 = ?
121 ÷ 11 = ?
72 ÷ 12 = ?
21 ÷ 3 = ?
84 ÷ 7 = ?
27 ÷ 9 = ?
8 ÷ 8 = ?
36 ÷ 9 = ?
10 ÷ 2 = ?
80 ÷ 8 = ?
108 ÷ 12 = ?
Step 2 — cross out the sentence with each answer
1.The villain spied the hidden doorway with a brass scope, then unrolled a rope ladder.
2.The villain lit up the ancient hallway with a torch lantern, then packed a leather satchel.
3.The villain lit up the ancient hallway with a torch lantern, then laced up climbing boots.
4.The villain cleared thick jungle vines with a machete blade, then laced up climbing boots.
5.The villain cleared thick jungle vines with a machete blade, then packed a leather satchel.
6.The villain swung across the canyon with a grappling hook, then unrolled a rope ladder.
7.The villain navigated the maze with a compass rose, then lit a signal flare.
8.The villain swung across the canyon with a grappling hook, then drank from a heavy canteen.
9.The villain spied the hidden doorway with a brass scope, then drank from a heavy canteen.
10.The villain navigated the maze with a compass rose, then packed a leather satchel.
11.The villain spied the hidden doorway with a brass scope, then packed a leather satchel.
12.The villain swung across the canyon with a grappling hook, then packed a leather satchel.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Secret of Sunken Temple
Culprit: Lara Croft (Grappling Hook · Heavy Canteen · Left Handed · Red Bandana · Golden Bats)
- Clue 1 (Multiplication facts (1-12)): "THE SNEAK DID NOT USE A SIGNAL FLARE"1 × 4 = 4 (T) · 9 × 5 = 45 (O) · 1 × 12 = 12 (D) · 10 × 11 = 110 (A) · 3 × 9 = 27 (F) · 4 × 10 = 40 (K) · 3 × 1 = 3 (I) · 9 × 8 = 72 (R) · 7 × 9 = 63 (G) · 8 × 11 = 88 (S) · 10 × 7 = 70 (N) · 7 × 8 = 56 (H) · 9 × 10 = 90 (L) · 12 × 10 = 120 (E) · 1 × 9 = 9 (U)
- Clue 2 (Skip counting): "TRACKS SHOW THE CULPRIT WAS LEFT HANDED"Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15 = 9 (T) · Skip-count by 2s. Fill the blank: 2, 4, 6, ___, 10, 12 = 8 (D) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, ___, 26, 28 = 24 (C) · Skip-count by 5s. Fill the blank: 5, 10, ___, 20, 25 = 15 (A) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130 = 110 (R) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, ___, 18, 20 = 16 (N) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48 = 42 (P) · Skip-count by 10s. Fill the blank: 10, 20, 30, ___, 50, 60 = 40 (W) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, ___, 60, 65 = 55 (K) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, ___, 65, 70 = 60 (H) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39 = 33 (I) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, ___, 150, 160 = 140 (S) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30 = 26 (F) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, ___, 40, 45 = 35 (O) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75 = 65 (E) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, ___, 90, 100 = 80 (L) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, ___, 50, 55 = 45 (U)
- Clue 3 (Rounding): "THE ROGUE FLED FROM THE GOLDEN BATS"Round 323 to the nearest hundred = 300 (T) · Round 8,520 to the nearest thousand = 9000 (L) · Round 367 to the nearest ten = 370 (H) · Round 52 to the nearest ten = 50 (E) · Round 903 to the nearest hundred = 900 (F) · Round 1,261 to the nearest hundred = 1300 (G) · Round 6,910 to the nearest thousand = 7000 (O) · Round 732 to the nearest hundred = 700 (S) · Round 294 to the nearest ten = 290 (R) · Round 233 to the nearest ten = 230 (U) · Round 94 to the nearest ten = 90 (M) · Round 1,673 to the nearest hundred = 1700 (D) · Round 5,439 to the nearest thousand = 5000 (N) · Round 1,986 to the nearest thousand = 2000 (A) · Round 3,680 to the nearest hundred = 3700 (B)
- Clue 4 (Addition): "A TORN RED BANDANA STRAP WAS DROPPED"1687 + 1143 = 2830 (A) · 5246 + 2524 = 7770 (S) · 1338 + 3105 = 4443 (N) · 5965 + 3422 = 9387 (P) · 1379 + 2553 = 3932 (R) · 5252 + 4290 = 9542 (E) · 1325 + 826 = 2151 (B) · 2477 + 1733 = 4210 (T) · 1525 + 2309 = 3834 (O) · 1728 + 3278 = 5006 (W) · 3464 + 3165 = 6629 (D)
- Clue 5 (Division facts (1-12)): surviving statement (box 8) → Lara Croft14 ÷ 7 = 2 · 121 ÷ 11 = 11 · 72 ÷ 12 = 6 · 21 ÷ 3 = 7 · 84 ÷ 7 = 12 · 27 ÷ 9 = 3 · 8 ÷ 8 = 1 · 36 ÷ 9 = 4 · 10 ÷ 2 = 5 · 80 ÷ 8 = 10 · 108 ÷ 12 = 9
About this mystery
- Grade level
- Grade 4 math
- Math topics
- Multiplication, Skip counting, Rounding, Addition, Division
- Reading level
- grades 5-6
- Theme
- The Secret of Sunken Temple — set in Mistbound Island Jungle
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects