🔎 Air franse flight 4427Grade 5Reading: grades 5-6AdditionMultiplicationFractions of a numberOrder of operations
The Mystery of Flight AF Four Four Two Seven
During the transatlantic flight of high-tech Jetliner 4427, someone tampered with the navigation controls! Detective, check the passenger log, interview suspects, and solve the math clues to identify the culprit before landing.
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 | Flight Gear | Avionics Gadget | Watch Wrist | Flight Cap Color | Distraction Tool |
|---|---|---|---|---|---|
| Specialist Valerie | Sonic Whistle | Static Shock Baton | Left Wrist | Silver Cap | Loud Siren |
| Dispatcher Hugo | Radar Goggles | Static Shock Baton | Right Wrist | Silver Cap | Cold Air Draft |
| Navigator Luc | Turbo Boots | Code Decrypter | Right Wrist | Silver Cap | Loud Siren |
| Mechanic Louis | Wind Glider | Code Decrypter | Left Wrist | Golden Cap | Bright Flashlight |
| Pilot Mathieu | Radar Goggles | Laser Pointer | Left Wrist | Silver Cap | Loud Siren |
| Captain Pierre | Radar Goggles | Laser Pointer | Right Wrist | Golden Cap | Loud Siren |
| Engineer Jean | Sonic Whistle | Code Decrypter | Right Wrist | Navy Cap | Loud Siren |
| Tech Etienne | Wind Glider | Static Shock Baton | Left Wrist | Navy Cap | Loud Siren |
| Agent Tristan | Wind Glider | Signal Jammer | Right Wrist | Golden Cap | Bright Flashlight |
| Attendant Chloe | Wind Glider | Beacon Scanner | Right Wrist | Silver Cap | Loud Siren |
| Purser Antoine | Jet Pack | Beacon Scanner | Left Wrist | Golden Cap | Cold Air Draft |
| Steward Benoit | Sonic Whistle | Laser Pointer | Left Wrist | Silver Cap | Cold Air Draft |
| Guard Gaspard | Jet Pack | Static Shock Baton | Right Wrist | Silver Cap | Loud Siren |
| Courier Elodie | Turbo Boots | Static Shock Baton | Right Wrist | Golden Cap | Loud Siren |
| Trainee Manon | Sonic Whistle | Signal Jammer | Right Wrist | Navy Cap | Bright Flashlight |
| Inspector Romain | Turbo Boots | Beacon Scanner | Left Wrist | Silver Cap | Bright Flashlight |
| Marshal Camille | Turbo Boots | Signal Jammer | Left Wrist | Silver Cap | Bright Flashlight |
| Officer Juliette | Turbo Boots | Signal Jammer | Right Wrist | Golden Cap | Bright Flashlight |
| Tech Henri | Radar Goggles | Beacon Scanner | Right Wrist | Silver Cap | Loud Siren |
| Agent Jacques | Radar Goggles | Signal Jammer | Right Wrist | Silver Cap | Loud Siren |
| Specialist Lea | Radar Goggles | Beacon Scanner | Right Wrist | Golden Cap | Loud Siren |
Clue 1
Addition
To calculate total cargo crates loaded onto Flight 4427 the crew added up each luggage bay count.
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
7095
3237
2328
3559
6037
2328
3935
8644
6062
3559
4310
3559
9765
2328
9180
T
7095
5734
4662
5734
6037
9774
T
7095
4310
3559
2328
3935
3559
4662
2661
6037
3935
3343
9116
3935
8378
8378
2328
5436
2355 + 4740 =T
2443 + 2219 =I
1019 + 1642 =G
1117 + 1211 =E
2183 + 3879 =Y
2601 + 2835 =R
1857 + 2078 =A
2890 + 6226 =J
2142 + 1095 =H
4085 + 4559 =K
5237 + 3141 =M
1609 + 1734 =L
4161 + 1876 =N
1710 + 2600 =U
2283 + 1276 =S
5190 + 4575 =P
2777 + 2957 =D
5221 + 4553 =O
3463 + 5717 =C
0/19 letters found
Clue 2
Multiplication facts (1-12)
The chief navigator checked the grid coordinates by multiplying rows of flight path dots.
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
7
56
70
21
110
66
66
4
110
81
50
108
6
70
4
50
4
T
7
25
56
108
81
T
7
56
70
6
110
42
56
T
7
50
6
110
14
T
7
1 × 7 =T
7 × 6 =G
11 × 6 =L
11 × 10 =I
7 × 3 =V
4 × 1 =A
5 × 5 =C
7 × 10 =E
7 × 8 =H
6 × 1 =R
7 × 2 =S
9 × 9 =N
12 × 9 =O
10 × 5 =W
0/14 letters found
Clue 3
Fractions of a number
The flight engineer determined how much remaining jet fuel was left in the wing tanks.
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
6
37
3
12
8
36
36
28
8
20
38
28
4
4
T
6
10
30
30
3
11
39
16
28
36
10
25
11
4
8
29
3
20
3/5 of 10 =T
2/8 of 148 =H
1/2 of 16 =I
4/8 of 56 =A
4/5 of 5 =S
1/4 of 116 =R
5/10 of 72 =L
4/8 of 32 =Y
3/10 of 130 =B
2/3 of 15 =O
3/6 of 6 =E
3/6 of 22 =D
1/2 of 40 =N
4/8 of 60 =P
1/8 of 96 =V
2/6 of 114 =W
2/8 of 100 =U
0/17 letters found
Clue 4
Order of operations
The copilot calculated the exact altitude adjustment using the automated flight formula.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
E
58
70
57
54
E
58
36
51
E
58
30
63
35
51
E
58
36
E
58
35
78
41
73
35
30
35
57
22
70
E
58
76
51
30
65
4 + 9 × 6 =E
7 × 8 - 20 =N
6 × 11 - 1 =P
4 × 11 - 14 =A
8 × 9 - 2 =V
23 + 3 × 4 =S
39 + 2 × 9 =I
8 × 10 - 26 =D
12 + 5 × 2 =L
6 × 11 - 3 =T
67 + 3 × 2 =W
12 × 8 - 18 =H
16 + 5 × 7 =C
60 + 2 × 8 =R
9 × 7 - 22 =O
0/15 letters found
Clue 5
Fractions of a number — the last clue
The air traffic controller analyzed the fraction of delayed flight paths on the radar display.
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
4/8 of 4 = ?
2/4 of 20 = ?
5/10 of 24 = ?
5/10 of 18 = ?
3/6 of 6 = ?
5/10 of 16 = ?
1/10 of 10 = ?
1/2 of 12 = ?
2/4 of 8 = ?
2/8 of 20 = ?
1/10 of 70 = ?
Step 2 — cross out the sentence with each answer
1.The villain deployed a wind glider, then aimed a laser pointer.
2.The villain deployed a wind glider, then activated a beacon scanner.
3.The villain scanned with radar goggles, then used a code decrypter.
4.The villain fired up a jet pack, then aimed a laser pointer.
5.The villain scanned with radar goggles, then switched on a signal jammer.
6.The villain scanned with radar goggles, then aimed a laser pointer.
7.The villain kicked on turbo boots, then activated a beacon scanner.
8.The villain blew a sonic whistle, then activated a beacon scanner.
9.The villain blew a sonic whistle, then switched on a signal jammer.
10.The villain kicked on turbo boots, then used a code decrypter.
11.The villain scanned with radar goggles, then activated a beacon scanner.
12.The villain fired up a jet pack, then tapped a static shock baton.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of Flight AF Four Four Two Seven
Culprit: Tech Henri (Radar Goggles · Beacon Scanner · Right Wrist · Silver Cap · Loud Siren)
- Clue 1 (Addition): "THE SNEAKY SUSPECT DID NOT USE A SIGNAL JAMMER"2355 + 4740 = 7095 (T) · 2443 + 2219 = 4662 (I) · 1019 + 1642 = 2661 (G) · 1117 + 1211 = 2328 (E) · 2183 + 3879 = 6062 (Y) · 2601 + 2835 = 5436 (R) · 1857 + 2078 = 3935 (A) · 2890 + 6226 = 9116 (J) · 2142 + 1095 = 3237 (H) · 4085 + 4559 = 8644 (K) · 5237 + 3141 = 8378 (M) · 1609 + 1734 = 3343 (L) · 4161 + 1876 = 6037 (N) · 1710 + 2600 = 4310 (U) · 2283 + 1276 = 3559 (S) · 5190 + 4575 = 9765 (P) · 2777 + 2957 = 5734 (D) · 5221 + 4553 = 9774 (O) · 3463 + 5717 = 9180 (C)
- Clue 2 (Multiplication facts (1-12)): "THE VILLAIN WORE A WATCH ON THE RIGHT WRIST"1 × 7 = 7 (T) · 7 × 6 = 42 (G) · 11 × 6 = 66 (L) · 11 × 10 = 110 (I) · 7 × 3 = 21 (V) · 4 × 1 = 4 (A) · 5 × 5 = 25 (C) · 7 × 10 = 70 (E) · 7 × 8 = 56 (H) · 6 × 1 = 6 (R) · 7 × 2 = 14 (S) · 9 × 9 = 81 (N) · 12 × 9 = 108 (O) · 10 × 5 = 50 (W)
- Clue 3 (Fractions of a number): "THE VILLAIN WAS STOPPED BY A LOUD SIREN"3/5 of 10 = 6 (T) · 2/8 of 148 = 37 (H) · 1/2 of 16 = 8 (I) · 4/8 of 56 = 28 (A) · 4/5 of 5 = 4 (S) · 1/4 of 116 = 29 (R) · 5/10 of 72 = 36 (L) · 4/8 of 32 = 16 (Y) · 3/10 of 130 = 39 (B) · 2/3 of 15 = 10 (O) · 3/6 of 6 = 3 (E) · 3/6 of 22 = 11 (D) · 1/2 of 40 = 20 (N) · 4/8 of 60 = 30 (P) · 1/8 of 96 = 12 (V) · 2/6 of 114 = 38 (W) · 2/8 of 100 = 25 (U)
- Clue 4 (Order of operations): "EVIDENCE AT SCENE SHOWS A SILVER CAP"4 + 9 × 6 = 58 (E) · 7 × 8 - 20 = 36 (N) · 6 × 11 - 1 = 65 (P) · 4 × 11 - 14 = 30 (A) · 8 × 9 - 2 = 70 (V) · 23 + 3 × 4 = 35 (S) · 39 + 2 × 9 = 57 (I) · 8 × 10 - 26 = 54 (D) · 12 + 5 × 2 = 22 (L) · 6 × 11 - 3 = 63 (T) · 67 + 3 × 2 = 73 (W) · 12 × 8 - 18 = 78 (H) · 16 + 5 × 7 = 51 (C) · 60 + 2 × 8 = 76 (R) · 9 × 7 - 22 = 41 (O)
- Clue 5 (Fractions of a number): surviving statement (box 11) → Tech Henri4/8 of 4 = 2 · 2/4 of 20 = 10 · 5/10 of 24 = 12 · 5/10 of 18 = 9 · 3/6 of 6 = 3 · 5/10 of 16 = 8 · 1/10 of 10 = 1 · 1/2 of 12 = 6 · 2/4 of 8 = 4 · 2/8 of 20 = 5 · 1/10 of 70 = 7
About this mystery
- Grade level
- Grade 5 math
- Math topics
- Addition, Multiplication, Fractions of a number, Order of operations
- Reading level
- grades 5-6
- Theme
- The Mystery of Flight AF Four Four Two Seven — set in Sky Route Alpha aboard Jetliner Flight 4427
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects