🔎 Johns hopsins all childrens Grade 10Reading: grades 7-9MultiplicationSubtractionAdditionPlace valueDivision
The Case of the Golden Stethoscope
The hospital parade is starting soon at Johns Hopkins All Children's Hospital in St. Petersburg, but someone has hidden the ceremonial Golden Stethoscope! Follow the trail, solve the medical math challenges, and help the staff save the big celebration.
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 | Specialty Department | Invention Tool | Badge Reel Position | Hair Style | Breakroom Snack |
|---|---|---|---|---|---|
| Dr Marie Curie | Sports Medicine | Infrared Thermometer | Left-sided badge clip | Wavy blonde hair | Lemon water |
| Dr Alice Hamilton | Pediatric Neurosurgery | Infrared Thermometer | Left-sided badge clip | Straight black hair | Apple slices |
| Dr Rosalind Franklin | Neonatology | Clinical Tablet | Right-sided badge clip | Straight black hair | Lemon water |
| Dr Elizabeth Blackwell | Neonatology | Clinical Tablet | Left-sided badge clip | Straight black hair | Peppermint tea |
| Dr Chien Wu | Child Life Specialist | Clinical Tablet | Left-sided badge clip | Straight black hair | Lemon water |
| Dr Gerty Cori | Neonatology | Smart Reflex Hammer | Left-sided badge clip | Wavy blonde hair | Peppermint tea |
| Dr Charles Drew | Pediatric Cardiology | Infrared Thermometer | Left-sided badge clip | Curly red hair | Apple slices |
| Dr Helen Taussig | Pediatric Neurosurgery | Clinical Tablet | Right-sided badge clip | Curly red hair | Apple slices |
| Dr Patricia Bath | Pediatric Cardiology | Infrared Thermometer | Right-sided badge clip | Wavy blonde hair | Peppermint tea |
| Dr Flossie Wong | Sports Medicine | Smart Reflex Hammer | Left-sided badge clip | Straight black hair | Lemon water |
| Dr Mary Walker | Pediatric Neurosurgery | Laser Pointer | Left-sided badge clip | Curly red hair | Peppermint tea |
| Dr Rebecca Lee | Neonatology | Infrared Thermometer | Left-sided badge clip | Wavy blonde hair | Lemon water |
| Dr Mae Jemison | Sports Medicine | Clinical Tablet | Left-sided badge clip | Straight black hair | Lemon water |
| Dr Dorothy Hodgkin | Child Life Specialist | Digital Otoscope | Right-sided badge clip | Curly red hair | Apple slices |
| Dr Barbara McClintock | Child Life Specialist | Clinical Tablet | Right-sided badge clip | Straight black hair | Peppermint tea |
| Dr Jane Wright | Pediatric Neurosurgery | Laser Pointer | Left-sided badge clip | Straight black hair | Lemon water |
| Dr Virginia Apgar | Neonatology | Infrared Thermometer | Left-sided badge clip | Curly red hair | Apple slices |
| Dr Daniel Williams | Child Life Specialist | Laser Pointer | Left-sided badge clip | Straight black hair | Lemon water |
| Dr Gertrude Elion | Child Life Specialist | Digital Otoscope | Left-sided badge clip | Wavy blonde hair | Lemon water |
| Dr Clara Barton | Pediatric Neurosurgery | Smart Reflex Hammer | Left-sided badge clip | Straight black hair | Lemon water |
| Dr Kizzmekia Corbett | Child Life Specialist | Laser Pointer | Left-sided badge clip | Wavy blonde hair | Lemon water |
Clue 1
Multiplication facts (1-12)
To narrow down the suspect's department, you inspect the toy donation crates stacked in equal rows in the hospital basement.
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
35
144
6
108
14
22
22
72
14
100
21
56
6
96
100
56
T
35
36
96
6
72
22
72
96
6
54
3
56
14
100
T
35
6
54
5 × 7 =T
12 × 8 =S
3 × 1 =P
10 × 10 =N
2 × 3 =E
6 × 9 =R
8 × 7 =O
2 × 11 =L
12 × 3 =U
7 × 2 =I
12 × 12 =H
12 × 9 =V
7 × 3 =D
8 × 9 =A
0/14 letters found
Clue 2
Subtraction
You check the scrub locker inventory and subtract the missing scrubs to figure out which floor the suspect visited.
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
1802
1335
4243
2790
2650
2790
3143
4243
3900
T
1802
3900
2500
4265
3143
2790
T
1802
1335
4243
4265
3793
1933
7485
1993
4257
4243
7980
7665
T
1802
1335
4243
2500
4243
6573
T
1802
6437 - 4635 =T
5482 - 4147 =H
5806 - 3156 =U
6296 - 4303 =D
6644 - 2744 =C
4637 - 2704 =B
5717 - 1452 =I
9100 - 4843 =G
4646 - 403 =E
5106 - 2606 =L
6380 - 2587 =R
8524 - 1039 =A
8162 - 1589 =F
4421 - 1278 =P
12033 - 4368 =N
6215 - 3425 =S
10250 - 2270 =O
0/17 letters found
Clue 3
Addition
A nurse combines the sticker counts from several pediatric recovery charts to unlock a restricted door log.
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
8283
9813
9343
6683
2224
6683
9229
9343
4238
T
8283
9229
5474
9343
9136
9343
5474
6683
4238
8332
3254
6506
3254
9343
2998
8332
8869
2798
5048
T
8283
9343
5474
3490 + 4793 =T
1434 + 1564 =M
2345 + 3129 =R
1694 + 2544 =C
3388 + 5955 =E
5930 + 3206 =F
4660 + 5153 =H
3533 + 5696 =P
3103 + 3403 =D
1566 + 1688 =L
6205 + 2664 =N
2564 + 2484 =A
1326 + 1472 =W
5378 + 2954 =O
1358 + 866 =U
2224 + 4459 =S
0/16 letters found
Clue 4
Place value
The digital readout on the hallway pager is blinking a code, and you must analyze the digit in the tens place to find the 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
90
700
7000
5000
50
60
2000
500
400
T
90
700
600
6000
6000
60
7000
7000
30
6000
T
90
500
600
400
100
700
T
90
1000
60
600
5000
30
700
600
400
500
What is the value of the 9 in 584,693?T
What is the value of the 1 in 733,157?G
What is the value of the 5 in 75,306?C
What is the value of the 7 in 64,753?H
What is the value of the 4 in 19,466?I
What is the value of the 6 in 82,643?A
What is the value of the 6 in 896,414?S
What is the value of the 7 in 317,043?E
What is the value of the 2 in 42,375?P
What is the value of the 3 in 72,038?K
What is the value of the 1 in 81,466?B
What is the value of the 5 in 938,509?R
What is the value of the 5 in 17,358?U
What is the value of the 6 in 353,165?L
0/14 letters found
Clue 5
Division facts (1-12) — the last clue
A volunteer shares a box of pediatric coloring books equally among the therapy wards to get the final clue from the staff.
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
28 ÷ 4 = ?
30 ÷ 10 = ?
25 ÷ 5 = ?
24 ÷ 12 = ?
6 ÷ 1 = ?
20 ÷ 2 = ?
4 ÷ 1 = ?
12 ÷ 1 = ?
48 ÷ 6 = ?
22 ÷ 2 = ?
63 ÷ 7 = ?
Step 2 — cross out the sentence with each answer
1.The villain walked through the rehab center, then misplaced a checklist clip.
2.The villain sneaked into the main lobby, then dropped a pack of stickers.
3.The villain explored the outdoor playground, then hummed the hospital song.
4.The villain explored the outdoor playground, then left a trail of toy bandages.
5.The villain visited the playroom lounge, then hummed the hospital song.
6.The villain visited the playroom lounge, then dropped a pack of stickers.
7.The villain explored the outdoor playground, then misplaced a checklist clip.
8.The villain sneaked into the main lobby, then misplaced a checklist clip.
9.The villain visited the playroom lounge, then misplaced a checklist clip.
10.The villain walked through the rehab center, then waved to the security guards.
11.The villain borrowed the golden stethoscope, then waved to the security guards.
12.The villain borrowed the golden stethoscope, then left a trail of toy bandages.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Case of the Golden Stethoscope
Culprit: Dr Clara Barton (Pediatric Neurosurgery · Smart Reflex Hammer · Left-sided badge clip · Straight black hair · Lemon water)
- Clue 1 (Multiplication facts (1-12)): "THE VILLAIN DOES NOT USE A LASER POINTER"5 × 7 = 35 (T) · 12 × 8 = 96 (S) · 3 × 1 = 3 (P) · 10 × 10 = 100 (N) · 2 × 3 = 6 (E) · 6 × 9 = 54 (R) · 8 × 7 = 56 (O) · 2 × 11 = 22 (L) · 12 × 3 = 36 (U) · 7 × 2 = 14 (I) · 12 × 12 = 144 (H) · 12 × 9 = 108 (V) · 7 × 3 = 21 (D) · 8 × 9 = 72 (A)
- Clue 2 (Subtraction): "THE SUSPECT CLIPS THEIR BADGE ON THE LEFT"6437 - 4635 = 1802 (T) · 5482 - 4147 = 1335 (H) · 5806 - 3156 = 2650 (U) · 6296 - 4303 = 1993 (D) · 6644 - 2744 = 3900 (C) · 4637 - 2704 = 1933 (B) · 5717 - 1452 = 4265 (I) · 9100 - 4843 = 4257 (G) · 4646 - 403 = 4243 (E) · 5106 - 2606 = 2500 (L) · 6380 - 2587 = 3793 (R) · 8524 - 1039 = 7485 (A) · 8162 - 1589 = 6573 (F) · 4421 - 1278 = 3143 (P) · 12033 - 4368 = 7665 (N) · 6215 - 3425 = 2790 (S) · 10250 - 2270 = 7980 (O)
- Clue 3 (Addition): "THE SUSPECT PREFERS COLD LEMON WATER"3490 + 4793 = 8283 (T) · 1434 + 1564 = 2998 (M) · 2345 + 3129 = 5474 (R) · 1694 + 2544 = 4238 (C) · 3388 + 5955 = 9343 (E) · 5930 + 3206 = 9136 (F) · 4660 + 5153 = 9813 (H) · 3533 + 5696 = 9229 (P) · 3103 + 3403 = 6506 (D) · 1566 + 1688 = 3254 (L) · 6205 + 2664 = 8869 (N) · 2564 + 2484 = 5048 (A) · 1326 + 1472 = 2798 (W) · 5378 + 2954 = 8332 (O) · 1358 + 866 = 2224 (U) · 2224 + 4459 = 6683 (S)
- Clue 4 (Place value): "THE CULPRIT HAS SLEEK STRAIGHT BLACK HAIR"What is the value of the 9 in 584,693? = 90 (T) · What is the value of the 1 in 733,157? = 100 (G) · What is the value of the 5 in 75,306? = 5000 (C) · What is the value of the 7 in 64,753? = 700 (H) · What is the value of the 4 in 19,466? = 400 (I) · What is the value of the 6 in 82,643? = 600 (A) · What is the value of the 6 in 896,414? = 6000 (S) · What is the value of the 7 in 317,043? = 7000 (E) · What is the value of the 2 in 42,375? = 2000 (P) · What is the value of the 3 in 72,038? = 30 (K) · What is the value of the 1 in 81,466? = 1000 (B) · What is the value of the 5 in 938,509? = 500 (R) · What is the value of the 5 in 17,358? = 50 (U) · What is the value of the 6 in 353,165? = 60 (L)
- Clue 5 (Division facts (1-12)): surviving statement (box 1) → Dr Clara Barton28 ÷ 4 = 7 · 30 ÷ 10 = 3 · 25 ÷ 5 = 5 · 24 ÷ 12 = 2 · 6 ÷ 1 = 6 · 20 ÷ 2 = 10 · 4 ÷ 1 = 4 · 12 ÷ 1 = 12 · 48 ÷ 6 = 8 · 22 ÷ 2 = 11 · 63 ÷ 7 = 9
About this mystery
- Grade level
- Grade 10 math
- Math topics
- Multiplication, Subtraction, Addition, Place value, Division
- Reading level
- grades 7-9
- Theme
- The Case of the Golden Stethoscope — set in Johns Hopkins All Children's Hospital
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects