🐱 Fractions of a number, multiGrade 5Reading: grades 5-6Fractions of a numberOrder of operationsMultiplicationRoundingDivision
The Great Equation Heist
The Golden Ratio Core has been stolen from Hexagon City. Detective Digit of the Cipher Squad must analyze the digital footprints left behind to recover the core before the entire system crashes.
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 | Main Power | Extra Gear | Keyboard Style | Hair Glitch Color | System Weakness |
|---|---|---|---|---|---|
| Claude Shannon | Prime Laser | Grid Gloves | Right-handed typing | Pixel Purple | Negative integer |
| Ada Lovelace | Factor Shield | Matrix Boots | Left-handed typing | Neon Blue | Negative integer |
| Mary Jackson | Percent Whip | Matrix Boots | Right-handed typing | Cyber Silver | Odd prime |
| Dorothy Vaughan | Factor Shield | Logarithm Lens | Left-handed typing | Cyber Silver | Negative integer |
| Charles Babbage | Percent Whip | Grid Gloves | Right-handed typing | Neon Blue | Negative integer |
| Sophie Germain | Decimal Cloak | Ratio Ring | Left-handed typing | Pixel Purple | Zero divisor |
| Euclid of Alexandria | Prime Laser | Matrix Boots | Right-handed typing | Pixel Purple | Zero divisor |
| Gladys West | Fraction Beam | Vector Visor | Left-handed typing | Neon Blue | Zero divisor |
| Katherine Johnson | Prime Laser | Vector Visor | Right-handed typing | Cyber Silver | Zero divisor |
| Leonhard Euler | Percent Whip | Grid Gloves | Left-handed typing | Pixel Purple | Odd prime |
| Blaise Pascal | Prime Laser | Grid Gloves | Right-handed typing | Neon Blue | Odd prime |
| Isaac Newton | Percent Whip | Matrix Boots | Left-handed typing | Cyber Silver | Zero divisor |
| Rene Descartes | Fraction Beam | Matrix Boots | Right-handed typing | Neon Blue | Odd prime |
| Grace Hopper | Prime Laser | Logarithm Lens | Right-handed typing | Neon Blue | Odd prime |
| Albert Einstein | Factor Shield | Grid Gloves | Right-handed typing | Pixel Purple | Odd prime |
| Sofia Kovalevskaya | Factor Shield | Ratio Ring | Right-handed typing | Neon Blue | Odd prime |
| Evelyn Granville | Fraction Beam | Vector Visor | Left-handed typing | Neon Blue | Odd prime |
| Margaret Hamilton | Factor Shield | Vector Visor | Left-handed typing | Pixel Purple | Negative integer |
| Carl Gauss | Decimal Cloak | Grid Gloves | Right-handed typing | Neon Blue | Zero divisor |
| John von Neumann | Decimal Cloak | Matrix Boots | Right-handed typing | Neon Blue | Odd prime |
| Alan Turing | Prime Laser | Matrix Boots | Right-handed typing | Cyber Silver | Odd prime |
Clue 1
Fractions of a number
To unlock the server room gate, Agent Decibel must calculate exactly two-thirds of the standby power generators to redirect their energy.
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
39
21
10
3
17
36
33
T
39
10
7
12
5
33
10
3
27
33
T
39
24
10
17
12
17
22
33
6
17
12
26
T
39
21
16
22
10
27
3
1/4 of 156 =T
2/4 of 52 =I
4/8 of 34 =A
4/8 of 20 =E
1/5 of 105 =H
4/10 of 60 =W
3/6 of 10 =D
1/4 of 28 =U
2/3 of 54 =B
3/5 of 55 =O
1/2 of 54 =N
4/6 of 24 =M
2/6 of 66 =L
8/10 of 15 =R
1/4 of 24 =G
6/8 of 4 =S
0/16 letters found
Clue 2
Order of operations
The backup firewall requires a specific sequence of codes. Detective Digit must solve the formula using the strict rules of operations to pass.
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
12
69
61
34
16
34
T
12
61
72
22
35
49
34
34
69
35
63
35
43
22
16
13
21
49
69
T
12
69
27
43
77
T
12
16
74
21
43
49
4 + 2 × 4 =T
20 + 7 × 7 =H
37 + 3 × 8 =E
6 × 12 - 29 =N
5 + 6 × 5 =O
4 + 4 × 3 =Y
1 + 4 × 3 =R
9 × 7 - 29 =S
62 + 5 × 2 =M
6 × 5 - 3 =A
12 × 2 - 2 =L
5 + 4 × 4 =I
27 + 9 × 4 =W
67 + 5 × 2 =D
41 + 2 × 4 =G
26 + 6 × 8 =P
0/16 letters found
Clue 3
Multiplication facts (1-12)
To map the hacker escape path, the Cipher Squad must multiply the grid sectors by the number of active data ports.
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
20
64
12
22
110
2
T
20
33
64
96
100
2
110
121
100
22
100
2
1
121
T
20
100
1
21
40
40
16
77
2
4
12
5 × 4 =T
4 × 4 =P
12 × 1 =E
5 × 8 =D
3 × 7 =O
1 × 1 =N
10 × 10 =A
11 × 2 =G
8 × 8 =H
1 × 2 =I
11 × 3 =C
8 × 12 =F
7 × 11 =R
10 × 11 =L
4 × 1 =M
11 × 11 =S
0/16 letters found
Clue 4
Rounding
The tracking radar is fuzzy and can only display coordinates rounded to the nearest thousand to target the rogue signal.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
N
30
900
1300
N
30
110
20
50
900
3700
300
110
900
500
2300
1700
900
500
900
20
900
3700
2900
1300
N
30
2900
5000
900
370
900
7000
110
1300
200
500
2000
Round 33 to the nearest tenN
Round 3,659 to the nearest hundredF
Round 539 to the nearest hundredR
Round 371 to the nearest tenK
Round 2,860 to the nearest hundredT
Round 331 to the nearest hundredI
Round 23 to the nearest tenL
Round 1,707 to the nearest hundredW
Round 51 to the nearest tenU
Round 2,356 to the nearest thousandD
Round 874 to the nearest hundredE
Round 2,285 to the nearest hundredS
Round 6,818 to the nearest thousandY
Round 200 to the nearest hundredA
Round 1,275 to the nearest hundredO
Round 5,184 to the nearest thousandH
Round 106 to the nearest tenB
0/17 letters found
Clue 5
Division facts (1-12) — the last clue
The captured data chips must be divided equally among the local server nodes to decode the final lock coordinate.
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
110 ÷ 11 = ?
12 ÷ 3 = ?
72 ÷ 8 = ?
55 ÷ 5 = ?
56 ÷ 7 = ?
24 ÷ 12 = ?
18 ÷ 6 = ?
120 ÷ 10 = ?
28 ÷ 4 = ?
40 ÷ 8 = ?
30 ÷ 5 = ?
Step 2 — cross out the sentence with each answer
1.The villain activates a factor shield, then escapes through a ratio ring.
2.The villain cracks a percent whip, then escapes through a ratio ring.
3.The villain fires a fraction beam, then scans the area with a vector visor.
4.The villain fires a fraction beam, then leaps away in matrix boots.
5.The villain cracks a percent whip, then scans the area with a vector visor.
6.The villain charges a prime laser, then leaps away in matrix boots.
7.The villain activates a factor shield, then scans the area with a vector visor.
8.The villain engages a decimal cloak, then types rapidly with grid gloves.
9.The villain engages a decimal cloak, then leaps away in matrix boots.
10.The villain charges a prime laser, then types rapidly with grid gloves.
11.The villain engages a decimal cloak, then escapes through a ratio ring.
12.The villain engages a decimal cloak, then zooms in using a logarithm lens.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Great Equation Heist
Culprit: Sofia Kovalevskaya (Factor Shield · Ratio Ring · Right-handed typing · Neon Blue · Odd prime)
- Clue 1 (Fractions of a number): "THE SABOTEUR DOES NOT WEAR A LOGARITHM LENS"1/4 of 156 = 39 (T) · 2/4 of 52 = 26 (I) · 4/8 of 34 = 17 (A) · 4/8 of 20 = 10 (E) · 1/5 of 105 = 21 (H) · 4/10 of 60 = 24 (W) · 3/6 of 10 = 5 (D) · 1/4 of 28 = 7 (U) · 2/3 of 54 = 36 (B) · 3/5 of 55 = 33 (O) · 1/2 of 54 = 27 (N) · 4/6 of 24 = 16 (M) · 2/6 of 66 = 22 (L) · 8/10 of 15 = 12 (R) · 1/4 of 24 = 6 (G) · 6/8 of 4 = 3 (S)
- Clue 2 (Order of operations): "THE SYSTEM LOGS SHOW ONLY RIGHT HAND TYPING"4 + 2 × 4 = 12 (T) · 20 + 7 × 7 = 69 (H) · 37 + 3 × 8 = 61 (E) · 6 × 12 - 29 = 43 (N) · 5 + 6 × 5 = 35 (O) · 4 + 4 × 3 = 16 (Y) · 1 + 4 × 3 = 13 (R) · 9 × 7 - 29 = 34 (S) · 62 + 5 × 2 = 72 (M) · 6 × 5 - 3 = 27 (A) · 12 × 2 - 2 = 22 (L) · 5 + 4 × 4 = 21 (I) · 27 + 9 × 4 = 63 (W) · 67 + 5 × 2 = 77 (D) · 41 + 2 × 4 = 49 (G) · 26 + 6 × 8 = 74 (P)
- Clue 3 (Multiplication facts (1-12)): "THE GLITCH FAILS AGAINST AN ODD PRIME"5 × 4 = 20 (T) · 4 × 4 = 16 (P) · 12 × 1 = 12 (E) · 5 × 8 = 40 (D) · 3 × 7 = 21 (O) · 1 × 1 = 1 (N) · 10 × 10 = 100 (A) · 11 × 2 = 22 (G) · 8 × 8 = 64 (H) · 1 × 2 = 2 (I) · 11 × 3 = 33 (C) · 8 × 12 = 96 (F) · 7 × 11 = 77 (R) · 10 × 11 = 110 (L) · 4 × 1 = 4 (M) · 11 × 11 = 121 (S)
- Clue 4 (Rounding): "NEON BLUE FIBERS WERE LEFT ON THE KEYBOARD"Round 33 to the nearest ten = 30 (N) · Round 3,659 to the nearest hundred = 3700 (F) · Round 539 to the nearest hundred = 500 (R) · Round 371 to the nearest ten = 370 (K) · Round 2,860 to the nearest hundred = 2900 (T) · Round 331 to the nearest hundred = 300 (I) · Round 23 to the nearest ten = 20 (L) · Round 1,707 to the nearest hundred = 1700 (W) · Round 51 to the nearest ten = 50 (U) · Round 2,356 to the nearest thousand = 2000 (D) · Round 874 to the nearest hundred = 900 (E) · Round 2,285 to the nearest hundred = 2300 (S) · Round 6,818 to the nearest thousand = 7000 (Y) · Round 200 to the nearest hundred = 200 (A) · Round 1,275 to the nearest hundred = 1300 (O) · Round 5,184 to the nearest thousand = 5000 (H) · Round 106 to the nearest ten = 110 (B)
- Clue 5 (Division facts (1-12)): surviving statement (box 1) → Sofia Kovalevskaya110 ÷ 11 = 10 · 12 ÷ 3 = 4 · 72 ÷ 8 = 9 · 55 ÷ 5 = 11 · 56 ÷ 7 = 8 · 24 ÷ 12 = 2 · 18 ÷ 6 = 3 · 120 ÷ 10 = 12 · 28 ÷ 4 = 7 · 40 ÷ 8 = 5 · 30 ÷ 5 = 6
About this mystery
- Grade level
- Grade 5 math
- Math topics
- Fractions of a number, Order of operations, Multiplication, Rounding, Division
- Reading level
- grades 5-6
- Theme
- The Great Equation Heist — set in The Mainframe of Hexagon City
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects