Grade 7Reading: grades 1-2Fractions of a numberMulti-step word problemsIntegersPercentages
The Golden Marshmallow Mystery
Oh no! The shiny Golden Marshmallow is missing from the camp cabin. A sneaky mischief maker took it! We must follow the clues and find them before the campfire song starts.
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 | Camp Tool | Camp Badge | Hand Sign | Hair Color | Camp Fear |
|---|---|---|---|---|---|
| Joy | walkie talkie | swift climbing | left-handed writer | jet black hair | hates itchy mud |
| Leo | walkie talkie | trail marking | left-handed writer | bright red hair | afraid of frogs |
| Max | laser flashlight | swift climbing | right-handed writer | bright red hair | allergic to pine |
| Zac | laser flashlight | trail marking | left-handed writer | jet black hair | hates itchy mud |
| Ned | walkie talkie | campfire building | left-handed writer | bright red hair | hates itchy mud |
| Amy | slingshot | swift climbing | left-handed writer | dusty brown hair | hates itchy mud |
| Wes | walkie talkie | rope tying | left-handed writer | bright red hair | hates itchy mud |
| Meg | slingshot | campfire building | left-handed writer | bright red hair | allergic to pine |
| Ivy | grappling hook | map reading | right-handed writer | dusty brown hair | afraid of frogs |
| Mia | laser flashlight | trail marking | left-handed writer | bright red hair | allergic to pine |
| Ben | magnifying glass | swift climbing | right-handed writer | bright red hair | afraid of frogs |
| Tad | magnifying glass | rope tying | left-handed writer | bright red hair | hates itchy mud |
| Kai | magnifying glass | trail marking | left-handed writer | bright red hair | afraid of frogs |
| Zoe | magnifying glass | swift climbing | right-handed writer | dusty brown hair | allergic to pine |
| Oli | walkie talkie | trail marking | left-handed writer | bright red hair | hates itchy mud |
| Roy | magnifying glass | rope tying | right-handed writer | bright red hair | hates itchy mud |
| Dan | laser flashlight | map reading | left-handed writer | jet black hair | hates itchy mud |
| Gus | grappling hook | map reading | left-handed writer | bright red hair | hates itchy mud |
| Eli | laser flashlight | campfire building | right-handed writer | bright red hair | afraid of frogs |
| Rex | grappling hook | map reading | right-handed writer | bright red hair | allergic to pine |
| Pip | walkie talkie | swift climbing | right-handed writer | dusty brown hair | hates itchy mud |
Clue 1
Fractions of a number
We need to count the group of suspect scouts. A fraction of them went down the trail. Let us find out how many stayed.
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
48
14
27
42
7
27
28
19
51
3
27
42
7
3
T
48
14
28
50
27
20
28
24
39
46
41
5
27
32
45
41
37
51
41
7
26
2/4 of 96 =T
2/10 of 95 =K
5/8 of 32 =C
1/4 of 112 =A
3/10 of 90 =E
3/6 of 90 =U
1/4 of 20 =R
1/4 of 56 =H
1/8 of 56 =N
2/3 of 39 =G
1/6 of 144 =M
4/6 of 75 =V
5/10 of 64 =B
5/10 of 82 =I
4/8 of 102 =D
1/3 of 126 =S
2/4 of 6 =O
5/10 of 78 =P
2/6 of 138 =F
2/6 of 111 =L
0/20 letters found
Clue 2
Multi-step word problems
We found bags of lost gear. We added new ropes, then gave some away. Let us count what is left.
Solve each problem to learn its letter, then write the letters in the boxes to fill in the missing word.
Awitnesssawthevillainwas .
L
19
80
84
45
53
15
57
D
80
D
W
R
I
45
80
R
Scout Leader collected 13 compasses in the morning and 44 compasses in the afternoon, then split them equally among 3 Forest Rangers. How many compasses did each get?L
There were 577 canteen bottles in all. 7 canteen bottles were set aside. The rest were shared equally among 10 Forest Rangers. How many canteen bottles did each get?N
Scout Leader filled 5 boxes with 4 badges each, then found 33 more badges. How many badges are there in all?H
Scout Leader filled 3 boxes with 2 compasses each, then found 78 more compasses. How many compasses are there in all?F
Scout Leader filled 5 boxes with 3 canteen bottles each, then found 65 more canteen bottles. How many canteen bottles are there in all?E
Scout Leader filled 2 boxes with 5 maps each, then found 35 more maps. How many maps are there in all?T
There were 82 compasses in all. 1 Forest Rangers used 22 compasses each. The other 4 Forest Rangers shared the rest equally. How many compasses did each of the other Forest Rangers get?A
0/7 letters found
Clue 3
Integers
The scout climbed up the ladder and then slipped down. Use the steps to find where they landed.
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
10
8
6
25
14
6
15
23
13
15
14
17
13
1
19
T
10
8
6
19
26
24
7 - (-3) =T
(-2) + 8 =E
(-1) + 27 =U
(-10) + 18 =H
(-5) + 30 =S
2 - (-13) =A
(-11) + 12 =O
12 - (-1) =R
10 - (-7) =F
21 - (-2) =K
(-8) + 27 =M
(-4) + 18 =N
(-8) + 32 =D
0/13 letters found
Clue 4
Percentages
Our walkie talkie has a battery bar. It shows how much power is left out of one hundred. Let us check it.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
R
46
4
6
15
39
16
R
46
23
22
R
46
39
37
6
23
55
4
R
46
4
21
37
22
15
4
54
R
46
39
37
59
15
5% of 920 =R
20% of 20 =E
20% of 275 =W
20% of 110 =T
25% of 236 =C
10% of 390 =A
5% of 740 =N
10% of 60 =D
60% of 35 =O
25% of 64 =I
60% of 90 =B
20% of 115 =S
5% of 300 =H
0/13 letters found
Clue 5
Fractions of a number — the last clue
We have a basket of shiny badges. Some are gold and some are silver. Let us find the part that shines.
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
2/4 of 12 = ?
1/10 of 30 = ?
4/5 of 5 = ?
5/8 of 8 = ?
1/4 of 40 = ?
2/10 of 10 = ?
1/10 of 10 = ?
1/6 of 66 = ?
1/5 of 40 = ?
1/2 of 18 = ?
1/4 of 28 = ?
Step 2 — cross out the sentence with each answer
1.The villain swung by on a grappling hook, then secured the gate with rope tying.
2.The villain whispered secrets into a walkie talkie, then scrambled up a tree with swift climbing.
3.The villain whispered secrets into a walkie talkie, then marked a path with trail marking.
4.The villain searched the ground with a magnifying glass, then secured the gate with rope tying.
5.The villain whispered secrets into a walkie talkie, then sketched a route with map reading.
6.The villain swung by on a grappling hook, then sketched a route with map reading.
7.The villain flashed a bright laser flashlight, then marked a path with trail marking.
8.The villain swung by on a grappling hook, then lit up the campsite with campfire building.
9.The villain swung by on a grappling hook, then marked a path with trail marking.
10.The villain flashed a bright laser flashlight, then lit up the campsite with campfire building.
11.The villain searched the ground with a magnifying glass, then scrambled up a tree with swift climbing.
12.The villain whispered secrets into a walkie talkie, then secured the gate with rope tying.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Golden Marshmallow Mystery
Culprit: Wes (walkie talkie · rope tying · left-handed writer · bright red hair · hates itchy mud)
- Clue 1 (Fractions of a number): "THE SNEAK DOES NOT HAVE CAMPFIRE BUILDING"2/4 of 96 = 48 (T) · 2/10 of 95 = 19 (K) · 5/8 of 32 = 20 (C) · 1/4 of 112 = 28 (A) · 3/10 of 90 = 27 (E) · 3/6 of 90 = 45 (U) · 1/4 of 20 = 5 (R) · 1/4 of 56 = 14 (H) · 1/8 of 56 = 7 (N) · 2/3 of 39 = 26 (G) · 1/6 of 144 = 24 (M) · 4/6 of 75 = 50 (V) · 5/10 of 64 = 32 (B) · 5/10 of 82 = 41 (I) · 4/8 of 102 = 51 (D) · 1/3 of 126 = 42 (S) · 2/4 of 6 = 3 (O) · 5/10 of 78 = 39 (P) · 2/6 of 138 = 46 (F) · 2/6 of 111 = 37 (L)
- Clue 2 (Multi-step word problems): "LEFT HANDED WRITER"Scout Leader collected 13 compasses in the morning and 44 compasses in the afternoon, then split them equally among 3 Forest Rangers. How many compasses did each get? = 19 (L) · There were 577 canteen bottles in all. 7 canteen bottles were set aside. The rest were shared equally among 10 Forest Rangers. How many canteen bottles did each get? = 57 (N) · Scout Leader filled 5 boxes with 4 badges each, then found 33 more badges. How many badges are there in all? = 53 (H) · Scout Leader filled 3 boxes with 2 compasses each, then found 78 more compasses. How many compasses are there in all? = 84 (F) · Scout Leader filled 5 boxes with 3 canteen bottles each, then found 65 more canteen bottles. How many canteen bottles are there in all? = 80 (E) · Scout Leader filled 2 boxes with 5 maps each, then found 35 more maps. How many maps are there in all? = 45 (T) · There were 82 compasses in all. 1 Forest Rangers used 22 compasses each. The other 4 Forest Rangers shared the rest equally. How many compasses did each of the other Forest Rangers get? = 15 (A)
- Clue 3 (Integers): "THE SNEAK RAN FROM THE MUD"7 - (-3) = 10 (T) · (-2) + 8 = 6 (E) · (-1) + 27 = 26 (U) · (-10) + 18 = 8 (H) · (-5) + 30 = 25 (S) · 2 - (-13) = 15 (A) · (-11) + 12 = 1 (O) · 12 - (-1) = 13 (R) · 10 - (-7) = 17 (F) · 21 - (-2) = 23 (K) · (-8) + 27 = 19 (M) · (-4) + 18 = 14 (N) · (-8) + 32 = 24 (D)
- Clue 4 (Percentages): "RED HAIR STRANDS WERE ON THE BRANCH"5% of 920 = 46 (R) · 20% of 20 = 4 (E) · 20% of 275 = 55 (W) · 20% of 110 = 22 (T) · 25% of 236 = 59 (C) · 10% of 390 = 39 (A) · 5% of 740 = 37 (N) · 10% of 60 = 6 (D) · 60% of 35 = 21 (O) · 25% of 64 = 16 (I) · 60% of 90 = 54 (B) · 20% of 115 = 23 (S) · 5% of 300 = 15 (H)
- Clue 5 (Fractions of a number): surviving statement (box 12) → Wes2/4 of 12 = 6 · 1/10 of 30 = 3 · 4/5 of 5 = 4 · 5/8 of 8 = 5 · 1/4 of 40 = 10 · 2/10 of 10 = 2 · 1/10 of 10 = 1 · 1/6 of 66 = 11 · 1/5 of 40 = 8 · 1/2 of 18 = 9 · 1/4 of 28 = 7
About this mystery
- Grade level
- Grade 7 math
- Math topics
- Fractions of a number, Multi-step word problems, Integers, Percentages
- Reading level
- grades 1-2
- Theme
- The Golden Marshmallow Mystery — set in Camp Evergreen
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects