🔎 The white houseGrade 5Reading: grades 5-6AdditionSubtractionMultiplicationPlace valueFractions of a number
The Mystery of the Missing Monument Miniature
A priceless miniature replica of the Washington Monument has vanished from its display case in the East Room! The Chief Usher noticed a strange draft and found a trail of clues leading down the historic corridors. As junior Secret Service agents, it is up to us to crack the codes, track the clues through the famous rooms, and catch the culprit before the big state dinner begins tonight.
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 | signature disguise | security pass | writing hand | wig color | distraction |
|---|---|---|---|---|---|
| Rosalynn | Tour Guide Blazer | Kitchen Access Fob | Right Handed Writer | Mahogany Brown Wig | Cherry Pie Scent |
| Betty | Secret Service Suit | Garden Gate Pass | Right Handed Writer | Mahogany Brown Wig | Ticking Clock Sounds |
| Dwight | Historical Reenactor Coat | Garden Gate Pass | Left Handed Writer | Silver Grey Wig | Bright Camera Flashes |
| Abraham | Historical Reenactor Coat | Oval Office Keycard | Left Handed Writer | Powder White Wig | Ticking Clock Sounds |
| George | Secret Service Suit | Press Room Badge | Right Handed Writer | Powder White Wig | Ticking Clock Sounds |
| Woodrow | Chef Apron | Press Room Badge | Right Handed Writer | Mahogany Brown Wig | Bright Camera Flashes |
| Gerald | Chef Apron | Press Room Badge | Left Handed Writer | Mahogany Brown Wig | Ticking Clock Sounds |
| Eleanor | Press Photographer Jacket | Garden Gate Pass | Right Handed Writer | Powder White Wig | Ticking Clock Sounds |
| Martha | Secret Service Suit | Garden Gate Pass | Left Handed Writer | Mahogany Brown Wig | Ticking Clock Sounds |
| Harry | Press Photographer Jacket | Oval Office Keycard | Left Handed Writer | Silver Grey Wig | Ticking Clock Sounds |
| Jacqueline | Press Photographer Jacket | Kitchen Access Fob | Left Handed Writer | Mahogany Brown Wig | Ticking Clock Sounds |
| Mary | Press Photographer Jacket | Oval Office Keycard | Right Handed Writer | Powder White Wig | Ticking Clock Sounds |
| Jimmy | Tour Guide Blazer | Kitchen Access Fob | Left Handed Writer | Mahogany Brown Wig | Ticking Clock Sounds |
| John | Chef Apron | Vault Code Scroll | Right Handed Writer | Powder White Wig | Ticking Clock Sounds |
| Nancy | Chef Apron | Vault Code Scroll | Left Handed Writer | Mahogany Brown Wig | Bright Camera Flashes |
| Edith | Secret Service Suit | Oval Office Keycard | Left Handed Writer | Mahogany Brown Wig | Ticking Clock Sounds |
| Bess | Historical Reenactor Coat | Garden Gate Pass | Left Handed Writer | Mahogany Brown Wig | Ticking Clock Sounds |
| Mamie | Tour Guide Blazer | Press Room Badge | Right Handed Writer | Mahogany Brown Wig | Ticking Clock Sounds |
| Ronald | Press Photographer Jacket | Press Room Badge | Left Handed Writer | Mahogany Brown Wig | Cherry Pie Scent |
| James | Tour Guide Blazer | Garden Gate Pass | Left Handed Writer | Silver Grey Wig | Bright Camera Flashes |
| Franklin | Historical Reenactor Coat | Kitchen Access Fob | Right Handed Writer | Powder White Wig | Cherry Pie Scent |
Clue 1
Addition
We tallied the visitor badges collected at both the East and West gates today. Adding these totals together gave us the secure access code to decrypt our 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
4426
8554
4203
4246
7905
2155
2155
5946
7905
4661
6334
5439
4203
6784
4661
5439
T
4426
8554
5946
4246
4203
T
4426
8554
4203
7606
7905
T
4426
4574
8554
4203
4661
5946
4574
4574
4203
6784
6784
7264
5439
3749
2875 + 1551 =T
2973 + 2466 =O
3236 + 5318 =H
2759 + 1902 =N
1223 + 932 =L
2206 + 1997 =E
1970 + 4364 =D
2755 + 3191 =A
5058 + 2206 =F
2897 + 1349 =V
2841 + 5064 =I
1174 + 2575 =B
1702 + 2872 =C
4459 + 2325 =S
4089 + 3517 =K
0/15 letters found
Clue 2
Subtraction
We compared the original silver spoon inventory from 1800 with today's counts. Subtracting the missing historical items revealed the exact cabinet where the next clue was hidden.
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
3209
6549
8315
5085
3114
5085
1604
8315
5112
T
3209
3083
4581
8566
T
3209
8315
5085
3083
8566
T
3209
6549
T
3209
6549
8315
8566
4581
6999
8315
1242
T
3209
6549
8790
5832
3170
4846 - 1637 =T
4932 - 1818 =U
8672 - 357 =E
3178 - 1936 =F
10859 - 3860 =L
11125 - 4576 =H
3615 - 445 =D
6935 - 1850 =S
6640 - 2059 =R
10054 - 4222 =N
3508 - 1904 =P
12198 - 3408 =A
9290 - 4178 =C
6163 - 3080 =W
10234 - 1668 =I
0/15 letters found
Clue 3
Multiplication facts (1-12)
The grand press room was set up with identical rows of chairs for the briefing. Multiplying the number of rows by the seats in each row unlocked the third clue on the computer.
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
121
132
72
120
132
1
45
72
7
56
72
120
100
56
18
1
22
100
72
56
1
9
18
100
5
T
121
10
5
24
11 × 11 =T
5 × 1 =E
1 × 1 =N
10 × 12 =K
2 × 11 =D
10 × 10 =S
6 × 3 =U
9 × 1 =F
8 × 9 =C
1 × 7 =L
3 × 8 =M
12 × 11 =I
9 × 5 =G
1 × 10 =H
8 × 7 =O
0/15 letters found
Clue 4
Place value
A suspicious sticky note pointed us to a historical plaque near the Rose Garden. Identifying the digit in the tens place of the dedication year gave us the key to reveal the fourth 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.
A
900
600
A
900
90
700
9000
A
900
200
10
100
8000
700
3000
200
800
300
8000
A
900
200
2000
3000
A
900
800
2000
8000
700
30
30
6000
2000
What is the value of the 9 in 52,918?A
What is the value of the 8 in 301,843?S
What is the value of the 3 in 23,877?W
What is the value of the 7 in 84,756?O
What is the value of the 1 in 76,167?B
What is the value of the 2 in 90,287?N
What is the value of the 1 in 476,513?Y
What is the value of the 6 in 26,490?E
What is the value of the 3 in 811,314?T
What is the value of the 9 in 49,446?G
What is the value of the 9 in 25,796?H
What is the value of the 8 in 98,766?R
What is the value of the 3 in 20,132?P
What is the value of the 2 in 12,795?D
What is the value of the 6 in 95,681?M
0/15 letters found
Clue 5
Fractions of a number — the last clue
The blueprint of the secret underground tunnels was divided into equal grids. Calculating a simple fraction of the total rooms pointed our search team directly to the final clue.
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
2/8 of 20 = ?
2/6 of 21 = ?
2/10 of 50 = ?
1/5 of 15 = ?
1/5 of 5 = ?
5/10 of 22 = ?
1/2 of 8 = ?
1/5 of 10 = ?
2/8 of 48 = ?
3/5 of 15 = ?
5/10 of 12 = ?
Step 2 — cross out the sentence with each answer
1.The villain leads a fake tour group wearing a tour guide blazer, then escapes onto the south lawn using a garden gate pass.
2.The villain wanders the historic halls in a historical reenactor coat, then swipes the lincoln desk key using an oval office keycard.
3.The villain slips past the security desk wearing a secret service suit, then unlocks the podium cabinet with a press room badge.
4.The villain wanders the historic halls in a historical reenactor coat, then sneaks into the pantry with a kitchen access fob.
5.The villain slips past the security desk wearing a secret service suit, then escapes onto the south lawn using a garden gate pass.
6.The villain blends into the briefing room wearing a press photographer jacket, then cracks the secret archive with a vault code scroll.
7.The villain sneaks into the state dining room in a chef apron, then unlocks the podium cabinet with a press room badge.
8.The villain wanders the historic halls in a historical reenactor coat, then escapes onto the south lawn using a garden gate pass.
9.The villain sneaks into the state dining room in a chef apron, then sneaks into the pantry with a kitchen access fob.
10.The villain slips past the security desk wearing a secret service suit, then swipes the lincoln desk key using an oval office keycard.
11.The villain blends into the briefing room wearing a press photographer jacket, then unlocks the podium cabinet with a press room badge.
12.The villain leads a fake tour group wearing a tour guide blazer, then cracks the secret archive with a vault code scroll.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Mystery of the Missing Monument Miniature
Culprit: Bess (Historical Reenactor Coat · Garden Gate Pass · Left Handed Writer · Mahogany Brown Wig · Ticking Clock Sounds)
- Clue 1 (Addition): "THE VILLAIN DOES NOT HAVE THE KITCHEN ACCESS FOB"2875 + 1551 = 4426 (T) · 2973 + 2466 = 5439 (O) · 3236 + 5318 = 8554 (H) · 2759 + 1902 = 4661 (N) · 1223 + 932 = 2155 (L) · 2206 + 1997 = 4203 (E) · 1970 + 4364 = 6334 (D) · 2755 + 3191 = 5946 (A) · 5058 + 2206 = 7264 (F) · 2897 + 1349 = 4246 (V) · 2841 + 5064 = 7905 (I) · 1174 + 2575 = 3749 (B) · 1702 + 2872 = 4574 (C) · 4459 + 2325 = 6784 (S) · 4089 + 3517 = 7606 (K)
- Clue 2 (Subtraction): "THE SUSPECT WRITES WITH THEIR LEFT HAND"4846 - 1637 = 3209 (T) · 4932 - 1818 = 3114 (U) · 8672 - 357 = 8315 (E) · 3178 - 1936 = 1242 (F) · 10859 - 3860 = 6999 (L) · 11125 - 4576 = 6549 (H) · 3615 - 445 = 3170 (D) · 6935 - 1850 = 5085 (S) · 6640 - 2059 = 4581 (R) · 10054 - 4222 = 5832 (N) · 3508 - 1904 = 1604 (P) · 12198 - 3408 = 8790 (A) · 9290 - 4178 = 5112 (C) · 6163 - 3080 = 3083 (W) · 10234 - 1668 = 8566 (I)
- Clue 3 (Multiplication facts (1-12)): "TICKING CLOCK SOUNDS CONFUSE THEM"11 × 11 = 121 (T) · 5 × 1 = 5 (E) · 1 × 1 = 1 (N) · 10 × 12 = 120 (K) · 2 × 11 = 22 (D) · 10 × 10 = 100 (S) · 6 × 3 = 18 (U) · 9 × 1 = 9 (F) · 8 × 9 = 72 (C) · 1 × 7 = 7 (L) · 3 × 8 = 24 (M) · 12 × 11 = 132 (I) · 9 × 5 = 45 (G) · 1 × 10 = 10 (H) · 8 × 7 = 56 (O)
- Clue 4 (Place value): "A MAHOGANY BROWN STRAND WAS DROPPED"What is the value of the 9 in 52,918? = 900 (A) · What is the value of the 8 in 301,843? = 800 (S) · What is the value of the 3 in 23,877? = 3000 (W) · What is the value of the 7 in 84,756? = 700 (O) · What is the value of the 1 in 76,167? = 100 (B) · What is the value of the 2 in 90,287? = 200 (N) · What is the value of the 1 in 476,513? = 10 (Y) · What is the value of the 6 in 26,490? = 6000 (E) · What is the value of the 3 in 811,314? = 300 (T) · What is the value of the 9 in 49,446? = 9000 (G) · What is the value of the 9 in 25,796? = 90 (H) · What is the value of the 8 in 98,766? = 8000 (R) · What is the value of the 3 in 20,132? = 30 (P) · What is the value of the 2 in 12,795? = 2000 (D) · What is the value of the 6 in 95,681? = 600 (M)
- Clue 5 (Fractions of a number): surviving statement (box 8) → Bess2/8 of 20 = 5 · 2/6 of 21 = 7 · 2/10 of 50 = 10 · 1/5 of 15 = 3 · 1/5 of 5 = 1 · 5/10 of 22 = 11 · 1/2 of 8 = 4 · 1/5 of 10 = 2 · 2/8 of 48 = 12 · 3/5 of 15 = 9 · 5/10 of 12 = 6
About this mystery
- Grade level
- Grade 5 math
- Math topics
- Addition, Subtraction, Multiplication, Place value, Fractions of a number
- Reading level
- grades 5-6
- Theme
- The Mystery of the Missing Monument Miniature — set in The White House West Wing
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects