🔎 Doctor, natureGrade 1Reading: grades 1-2Place valueAdditionSubtractionSkip countingMissing addends
The Case of the Missing Magic Seed
Oh no! Someone took the magic golden seed from the forest clinic. The animals are sick and need its healing glow. We must find the thief!
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 | Nature Magic | Forest Gear | Writing Hand | Hair Color | Allergy |
|---|---|---|---|---|---|
| Dr George | animal speech | a leaf cape | right-handed writer | bark brown hair | sticky pine sap |
| Dr Fay | animal speech | a leaf cape | left-handed writer | moss green hair | itchy nettles |
| Dr Dan | cloud calling | a sun visor | right-handed writer | leaf yellow hair | itchy nettles |
| Dr Roy | animal speech | a pine badge | right-handed writer | leaf yellow hair | loud bird calls |
| Dr Sam | wind healing | muddy boots | left-handed writer | bark brown hair | sticky pine sap |
| Dr Carlos | plant growth | a vine rope | right-handed writer | moss green hair | loud bird calls |
| Dr Zoe | tree climbing | muddy boots | left-handed writer | bark brown hair | sticky pine sap |
| Dr Kim | wind healing | muddy boots | left-handed writer | bark brown hair | itchy nettles |
| Dr Pat | wind healing | a leaf cape | left-handed writer | leaf yellow hair | sticky pine sap |
| Dr Max | wind healing | a leaf cape | left-handed writer | moss green hair | sticky pine sap |
| Dr Jane | animal speech | muddy boots | right-handed writer | bark brown hair | sticky pine sap |
| Dr Leo | animal speech | a sun visor | right-handed writer | moss green hair | sticky pine sap |
| Dr Ray | wind healing | a vine rope | left-handed writer | bark brown hair | itchy nettles |
| Dr Val | tree climbing | a pine badge | left-handed writer | bark brown hair | sticky pine sap |
| Dr Elizabeth | plant growth | a vine rope | left-handed writer | bark brown hair | sticky pine sap |
| Dr Jan | cloud calling | muddy boots | left-handed writer | bark brown hair | itchy nettles |
| Dr Mae | plant growth | a pine badge | left-handed writer | bark brown hair | sticky pine sap |
| Dr Rex | cloud calling | a pine badge | right-handed writer | moss green hair | loud bird calls |
| Dr Alice | wind healing | a pine badge | right-handed writer | leaf yellow hair | itchy nettles |
| Dr Ben | plant growth | a leaf cape | right-handed writer | moss green hair | itchy nettles |
| Dr Grace | tree climbing | a sun visor | left-handed writer | bark brown hair | itchy nettles |
Clue 1
Place value
The clinic scale has a screen. It shows tens and ones to weigh the dry leaves.
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
45
82
34
48
43
74
74
90
56
T
45
90
27
74
90
34
66
83
90
T
45
71
34
43
27
43
88
32
83
34
27
90
81
34
What number has 4 tens and 5 ones?T
What number has 8 tens and 1 one?P
What number has 4 tens and 3 ones?A
What number has 7 tens and 1 one?W
What number has 3 tens and 2 ones?I
What number has 7 tens and 4 ones?D
What number has 8 tens and 8 ones?V
What number has 9 tens and 0 ones?O
What number has 6 tens and 6 ones?S
What number has 3 tens and 4 ones?E
What number has 4 tens and 8 ones?B
What number has 5 tens and 6 ones?C
What number has 8 tens and 3 ones?N
What number has 2 tens and 7 ones?R
What number has 8 tens and 2 ones?H
0/15 letters found
Clue 2
Addition
We count the clean bandages we have. Let us add them up to find the total.
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
16
5
10
14
3
2
2
18
3
19
8
13
3
T
16
10
4
17
2
11
10
4
8
3
T
16
5
T
16
5
10
2
10
9
T
16
5
18
19
15
11 + 5 =T
8 + 10 =A
9 + 8 =C
7 + 6 =R
10 + 5 =D
2 + 1 =I
7 + 3 =E
6 + 2 =W
6 + 13 =N
2 + 2 =S
4 + 7 =U
6 + 3 =F
3 + 2 =H
9 + 5 =V
1 + 1 =L
0/15 letters found
Clue 3
Subtraction
We had some healing juice in bottles. We gave some to the deer and have less now.
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
8
10
3
7
18
6
6
4
18
19
5
13
19
2
9
5
11
15
2
T
8
18
16
1
17
14
18
19
3
2
4
14
12 - 4 =T
20 - 3 =Y
16 - 1 =M
20 - 1 =N
17 - 8 =F
7 - 4 =E
14 - 7 =V
17 - 3 =P
8 - 6 =S
17 - 7 =H
17 - 6 =O
15 - 2 =U
9 - 5 =A
13 - 7 =L
6 - 5 =K
12 - 7 =R
20 - 2 =I
18 - 2 =C
0/18 letters found
Clue 4
Skip counting
The squirrels left nuts in groups of five. We can skip count them on the dirt path.
Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.
W
33
90
65
24
60
100
12
6
25
39
26
100
12
6
24
65
9
26
39
42
9
39
24
W
33
100
110
26
15
39
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39W
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45R
Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15B
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, ___, 18, 21I
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, ___, 30, 35T
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130H
Skip-count by 3s. Fill the blank: 3, 6, 9, ___, 15, 18D
Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10S
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30A
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120N
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110E
Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75F
Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48K
Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, ___, 70, 80U
Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, ___, 26, 28O
0/15 letters found
Clue 5
Missing addends — the last clue
The first aid box has space for ten seeds. We must find how many are missing.
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
5 + ___ = 9
7 + ___ = 14
3 + ___ = 9
5 + ___ = 8
7 + ___ = 9
8 + ___ = 20
10 + ___ = 21
10 + ___ = 19
3 + ___ = 11
9 + ___ = 14
5 + ___ = 15
Step 2 — cross out the sentence with each answer
1.The villain grows giant fast moss, then pins on a shiny pine badge.
2.The villain climbs the tallest pine, then puts on a sun visor.
3.The villain calls down a warm rain, then twirls a strong vine rope.
4.The villain climbs the tallest pine, then pins on a shiny pine badge.
5.The villain climbs the tallest pine, then twirls a strong vine rope.
6.The villain climbs the tallest pine, then zips up muddy boots.
7.The villain heals the sick oak tree, then zips up muddy boots.
8.The villain whispers to wild foxes, then wraps a green leaf cape.
9.The villain heals the sick oak tree, then puts on a sun visor.
10.The villain whispers to wild foxes, then pins on a shiny pine badge.
11.The villain grows giant fast moss, then zips up muddy boots.
12.The villain heals the sick oak tree, then twirls a strong vine rope.
Solve it
Name the culprit
Choose the one suspect left standing.
Answer Key — The Case of the Missing Magic Seed
Culprit: Dr Mae (plant growth · a pine badge · left-handed writer · bark brown hair · sticky pine sap)
- Clue 1 (Place value): "THE BAD DOCTOR DOES NOT WEAR A VINE ROPE"What number has 4 tens and 5 ones? = 45 (T) · What number has 8 tens and 1 one? = 81 (P) · What number has 4 tens and 3 ones? = 43 (A) · What number has 7 tens and 1 one? = 71 (W) · What number has 3 tens and 2 ones? = 32 (I) · What number has 7 tens and 4 ones? = 74 (D) · What number has 8 tens and 8 ones? = 88 (V) · What number has 9 tens and 0 ones? = 90 (O) · What number has 6 tens and 6 ones? = 66 (S) · What number has 3 tens and 4 ones? = 34 (E) · What number has 4 tens and 8 ones? = 48 (B) · What number has 5 tens and 6 ones? = 56 (C) · What number has 8 tens and 3 ones? = 83 (N) · What number has 2 tens and 7 ones? = 27 (R) · What number has 8 tens and 2 ones? = 82 (H)
- Clue 2 (Addition): "THE VILLAIN WRITES CLUES WITH THE LEFT HAND"11 + 5 = 16 (T) · 8 + 10 = 18 (A) · 9 + 8 = 17 (C) · 7 + 6 = 13 (R) · 10 + 5 = 15 (D) · 2 + 1 = 3 (I) · 7 + 3 = 10 (E) · 6 + 2 = 8 (W) · 6 + 13 = 19 (N) · 2 + 2 = 4 (S) · 4 + 7 = 11 (U) · 6 + 3 = 9 (F) · 3 + 2 = 5 (H) · 9 + 5 = 14 (V) · 1 + 1 = 2 (L)
- Clue 3 (Subtraction): "THE VILLAIN RUNS FROM STICKY PINE SAP"12 - 4 = 8 (T) · 20 - 3 = 17 (Y) · 16 - 1 = 15 (M) · 20 - 1 = 19 (N) · 17 - 8 = 9 (F) · 7 - 4 = 3 (E) · 14 - 7 = 7 (V) · 17 - 3 = 14 (P) · 8 - 6 = 2 (S) · 17 - 7 = 10 (H) · 17 - 6 = 11 (O) · 15 - 2 = 13 (U) · 9 - 5 = 4 (A) · 13 - 7 = 6 (L) · 6 - 5 = 1 (K) · 12 - 7 = 5 (R) · 20 - 2 = 18 (I) · 18 - 2 = 16 (C)
- Clue 4 (Skip counting): "WE FOUND STRANDS OF BARK BROWN HAIR"Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, ___, 36, 39 = 33 (W) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ___, 42, 45 = 39 (R) · Skip-count by 3s. Fill the blank: 3, 6, ___, 12, 15 = 9 (B) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, ___, 18, 21 = 15 (I) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, ___, 30, 35 = 25 (T) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, ___, 120, 130 = 110 (H) · Skip-count by 3s. Fill the blank: 3, 6, 9, ___, 15, 18 = 12 (D) · Skip-count by 2s. Fill the blank: 2, 4, ___, 8, 10 = 6 (S) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, ___, 28, 30 = 26 (A) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, 90, ___, 110, 120 = 100 (N) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, 60, 70, 80, ___, 100, 110 = 90 (E) · Skip-count by 5s. Fill the blank: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, ___, 70, 75 = 65 (F) · Skip-count by 3s. Fill the blank: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, ___, 45, 48 = 42 (K) · Skip-count by 10s. Fill the blank: 10, 20, 30, 40, 50, ___, 70, 80 = 60 (U) · Skip-count by 2s. Fill the blank: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, ___, 26, 28 = 24 (O)
- Clue 5 (Missing addends): surviving statement (box 1) → Dr Mae5 + ___ = 9 = 4 · 7 + ___ = 14 = 7 · 3 + ___ = 9 = 6 · 5 + ___ = 8 = 3 · 7 + ___ = 9 = 2 · 8 + ___ = 20 = 12 · 10 + ___ = 21 = 11 · 10 + ___ = 19 = 9 · 3 + ___ = 11 = 8 · 9 + ___ = 14 = 5 · 5 + ___ = 15 = 10
About this mystery
- Grade level
- Grade 1 math
- Math topics
- Place value, Addition, Subtraction, Skip counting, Missing addends
- Reading level
- grades 1-2
- Theme
- The Case of the Missing Magic Seed — set in Whispering Woods Clinic
- Format
- Interactive online & printable worksheet with answer key
- Solution
- One unique, verified culprit among 21 suspects