🔎 Stranger ThingsGrade 6Reading: grades 3-4MultiplicationMulti-step word problemsWord problemsSubtractionMissing addends
Mystery of the Shadow Rift
A strange tear in space has opened near the town lab, and the Shadow Phantom is causing chaotic power surges! Chief Guard Miller needs your detective team to solve the clues and stop the villain before midnight.
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 Ability | Hand Preference | Hairstyle | Weakness |
|---|---|---|---|---|---|
| Dustin | Portal Blast | Static Flash | Left Handed | Messy Bowl Cut | Waffle Crumbs |
| Bob | Telekinesis | Fire Spark | Left Handed | Messy Bowl Cut | Waffle Crumbs |
| Billy | Shadow Cloak | Fire Spark | Left Handed | Curly Buzzcut | Waffle Crumbs |
| Lucas | Portal Blast | Echo Pulse | Right Handed | Messy Bowl Cut | Waffle Crumbs |
| Joyce | Portal Blast | Gravity Flip | Left Handed | Messy Bowl Cut | Waffle Crumbs |
| Eddie | Portal Blast | Gravity Flip | Left Handed | Messy Bowl Cut | Bright Flashlight |
| Argyle | Sonic Screech | Crystal Shield | Left Handed | Slicked Spikes | Bright Flashlight |
| Hopper | Mind Freeze | Echo Pulse | Left Handed | Messy Bowl Cut | Waffle Crumbs |
| Murray | Portal Blast | Gravity Flip | Right Handed | Curly Buzzcut | Bright Flashlight |
| Mike | Shadow Cloak | Gravity Flip | Left Handed | Slicked Spikes | Blaring Boombox |
| Jonathan | Portal Blast | Gravity Flip | Right Handed | Messy Bowl Cut | Blaring Boombox |
| Eleven | Telekinesis | Static Flash | Left Handed | Messy Bowl Cut | Blaring Boombox |
| Robin | Telekinesis | Crystal Shield | Right Handed | Slicked Spikes | Bright Flashlight |
| Wayne | Mind Freeze | Gravity Flip | Left Handed | Messy Bowl Cut | Waffle Crumbs |
| Gareth | Mind Freeze | Fire Spark | Right Handed | Messy Bowl Cut | Waffle Crumbs |
| Vickie | Mind Freeze | Echo Pulse | Right Handed | Slicked Spikes | Blaring Boombox |
| Eden | Portal Blast | Echo Pulse | Right Handed | Curly Buzzcut | Blaring Boombox |
| Fred | Shadow Cloak | Static Flash | Right Handed | Messy Bowl Cut | Waffle Crumbs |
| Nancy | Portal Blast | Crystal Shield | Right Handed | Slicked Spikes | Bright Flashlight |
| Max | Sonic Screech | Gravity Flip | Right Handed | Curly Buzzcut | Blaring Boombox |
| Steve | Shadow Cloak | Crystal Shield | Left Handed | Curly Buzzcut | Bright Flashlight |
Clue 1
Multiplication facts (1-12)
Officer Jim inspects rows of storage crates at the lab to calculate total flashlights.
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
44
22
144
42
120
32
32
18
120
15
5
27
144
121
15
27
T
44
63
121
144
144
55
22
27
14
63
32
121
144
4 × 11 =T
5 × 11 =C
1 × 5 =D
6 × 7 =V
2 × 11 =H
2 × 9 =A
8 × 4 =L
3 × 5 =N
12 × 10 =I
3 × 9 =O
11 × 11 =S
9 × 7 =U
12 × 12 =E
2 × 7 =P
0/14 letters found
Clue 2
Multi-step word problems
The AV Club packs walkie talkies and extra batteries for night patrol in several steps.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Awitnesssawthevillainwas .
L
69
58
24
57
81
83
9
D
58
D
There were 348 waffles in all. 3 waffles were set aside. The rest were shared equally among 5 AV Club. How many waffles did each get?L
Officer Jim filled 6 boxes with 9 waffles each, then found 29 more waffles. How many waffles are there in all?A
Officer Jim earned 2 waffles in each of 2 rounds, plus 57 bonus waffles. Then 4 waffles were lost. How many waffles are left?T
There were 553 batteries in all. 31 batteries were set aside. The rest were shared equally among 9 AV Club. How many batteries did each get?E
There were 27 waffles in all. 9 waffles were set aside. The rest were shared equally among 2 AV Club. How many waffles did each get?N
Officer Jim earned 7 cassette tapes in each of 4 rounds, plus 64 bonus cassette tapes. Then 11 cassette tapes were lost. How many cassette tapes are left?H
Officer Jim collected 79 cassette tapes in the morning and 65 cassette tapes in the afternoon, then split them equally among 6 AV Club. How many cassette tapes did each get?F
0/7 letters found
Clue 3
Word problems
The detective team tracks signal strength across the town to find the shadow portal.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Someonescaredthevillainoffwith .
W
81
8
11
11
6
20
75
56
U
M
B
S
Officer Jim found 3 flashlights yesterday and 78 more today. How many flashlights in all?W
There were 79 walkie talkies. 4 were used up. How many walkie talkies are left?C
There were 15 waffles. 4 were used up. How many waffles are left?F
Officer Jim found 19 flashlights yesterday and 37 more today. How many flashlights in all?R
Officer Jim found 16 waffles yesterday and 4 more today. How many waffles in all?E
Officer Jim lined up 3 rows of 2 walkie talkies. How many walkie talkies in all?L
Officer Jim found 5 batteries yesterday and 3 more today. How many batteries in all?A
0/7 letters found
Clue 4
Subtraction
After a sudden power surge, Chief Miller counts how many waffles remain in the freezer.
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
4259
6207
6482
1142
5071
6482
2883
6482
6207
4257
8865
2560
6683
5071
7161
1142
6683
6467
4257
5652
6482
1142
1142
1722
2991
6683
3260
2560
5071
5831
T
4259
7718 - 3459 =T
7926 - 2855 =C
4444 - 2722 =Y
6907 - 2650 =A
7063 - 4503 =L
4936 - 1676 =W
8230 - 2399 =U
10104 - 3622 =E
13125 - 4260 =D
7745 - 4754 =B
8514 - 1831 =O
8961 - 3309 =M
10797 - 4330 =F
10724 - 4517 =H
2308 - 1166 =S
6458 - 3575 =N
11289 - 4128 =K
0/17 letters found
Clue 5
Missing addends — the last clue
Dustin needs to find the missing energy value to restore power to the radio tower.
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
17 + ___ = 19
20 + ___ = 21
37 + ___ = 45
25 + ___ = 30
7 + ___ = 11
21 + ___ = 27
34 + ___ = 45
12 + ___ = 19
18 + ___ = 21
5 + ___ = 17
28 + ___ = 37
Step 2 — cross out the sentence with each answer
1.The villain moving objects with mind, then sparking hot fire.
2.The villain opening dark portals, then flipping the room gravity.
3.The villain opening dark portals, then raising a crystal shield.
4.The villain freezing the room, then raising a crystal shield.
5.The villain hiding in dark shadows, then flipping the room gravity.
6.The villain hiding in dark shadows, then raising a crystal shield.
7.The villain moving objects with mind, then flashing bright static.
8.The villain freezing the room, then flipping the room gravity.
9.The villain moving objects with mind, then flipping the room gravity.
10.The villain opening dark portals, then flashing bright static.
11.The villain screeching loudly, then raising a crystal shield.
12.The villain screeching loudly, then flashing bright static.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — Mystery of the Shadow Rift
Culprit: Dustin (Portal Blast · Static Flash · Left Handed · Messy Bowl Cut · Waffle Crumbs)
- Clue 1 (Multiplication facts (1-12)): "THE VILLAIN DOES NOT USE ECHO PULSE"4 × 11 = 44 (T) · 5 × 11 = 55 (C) · 1 × 5 = 5 (D) · 6 × 7 = 42 (V) · 2 × 11 = 22 (H) · 2 × 9 = 18 (A) · 8 × 4 = 32 (L) · 3 × 5 = 15 (N) · 12 × 10 = 120 (I) · 3 × 9 = 27 (O) · 11 × 11 = 121 (S) · 9 × 7 = 63 (U) · 12 × 12 = 144 (E) · 2 × 7 = 14 (P)
- Clue 2 (Multi-step word problems): "LEFT HANDED"There were 348 waffles in all. 3 waffles were set aside. The rest were shared equally among 5 AV Club. How many waffles did each get? = 69 (L) · Officer Jim filled 6 boxes with 9 waffles each, then found 29 more waffles. How many waffles are there in all? = 83 (A) · Officer Jim earned 2 waffles in each of 2 rounds, plus 57 bonus waffles. Then 4 waffles were lost. How many waffles are left? = 57 (T) · There were 553 batteries in all. 31 batteries were set aside. The rest were shared equally among 9 AV Club. How many batteries did each get? = 58 (E) · There were 27 waffles in all. 9 waffles were set aside. The rest were shared equally among 2 AV Club. How many waffles did each get? = 9 (N) · Officer Jim earned 7 cassette tapes in each of 4 rounds, plus 64 bonus cassette tapes. Then 11 cassette tapes were lost. How many cassette tapes are left? = 81 (H) · Officer Jim collected 79 cassette tapes in the morning and 65 cassette tapes in the afternoon, then split them equally among 6 AV Club. How many cassette tapes did each get? = 24 (F)
- Clue 3 (Word problems): "WAFFLE CRUMBS"Officer Jim found 3 flashlights yesterday and 78 more today. How many flashlights in all? = 81 (W) · There were 79 walkie talkies. 4 were used up. How many walkie talkies are left? = 75 (C) · There were 15 waffles. 4 were used up. How many waffles are left? = 11 (F) · Officer Jim found 19 flashlights yesterday and 37 more today. How many flashlights in all? = 56 (R) · Officer Jim found 16 waffles yesterday and 4 more today. How many waffles in all? = 20 (E) · Officer Jim lined up 3 rows of 2 walkie talkies. How many walkie talkies in all? = 6 (L) · Officer Jim found 5 batteries yesterday and 3 more today. How many batteries in all? = 8 (A)
- Clue 4 (Subtraction): "THE SCENE HAD LOCKS OF A MESSY BOWL CUT"7718 - 3459 = 4259 (T) · 7926 - 2855 = 5071 (C) · 4444 - 2722 = 1722 (Y) · 6907 - 2650 = 4257 (A) · 7063 - 4503 = 2560 (L) · 4936 - 1676 = 3260 (W) · 8230 - 2399 = 5831 (U) · 10104 - 3622 = 6482 (E) · 13125 - 4260 = 8865 (D) · 7745 - 4754 = 2991 (B) · 8514 - 1831 = 6683 (O) · 8961 - 3309 = 5652 (M) · 10797 - 4330 = 6467 (F) · 10724 - 4517 = 6207 (H) · 2308 - 1166 = 1142 (S) · 6458 - 3575 = 2883 (N) · 11289 - 4128 = 7161 (K)
- Clue 5 (Missing addends): surviving statement (box 10) → Dustin17 + ___ = 19 = 2 · 20 + ___ = 21 = 1 · 37 + ___ = 45 = 8 · 25 + ___ = 30 = 5 · 7 + ___ = 11 = 4 · 21 + ___ = 27 = 6 · 34 + ___ = 45 = 11 · 12 + ___ = 19 = 7 · 18 + ___ = 21 = 3 · 5 + ___ = 17 = 12 · 28 + ___ = 37 = 9
About this mystery
- Grade level
- Grade 6 math
- Math topics
- Multiplication, Multi-step word problems, Word problems, Subtraction, Missing addends
- Reading level
- grades 3-4
- Theme
- Mystery of the Shadow Rift — set in Oakhaven Town Library and Lab
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects