Math Mysteries
🐶 DogsGrade 4Reading: grades 3-4Place valueAdditionRoundingSubtractionDivision

The Golden Bone Heist

The legendary Golden Bone Trophy has been swiped from the park clubhouse. A sneaky pup did it, leaving behind a trail of chew toys and paw prints. Ranger Pete needs your help to sniff out the suspect before the annual dog show begins.

Suspects

Possible suspects

Cross off a row as each clue rules it out. On screen, tap a row.

21 of 21 still in play
NameBark StyleFavorite ToyDominant PawFur CoatTreat Distraction
Bolthigh jumprope knotright-pawedfluffy gold furpeanut butter
Maxhigh jumpsqueaky ballleft-pawedspotted white furcheddar cheese
Lolamega sniffrubber duckright-pawedcurly black furcheddar cheese
Rexhigh jumpplush bearleft-pawedspotted white furcheddar cheese
Lassiemega sniffflying frisbeeright-pawedfluffy gold furpeanut butter
Rockymega sniffrope knotright-pawedcurly black furbacon strips
Fidosonic barkrubber duckright-pawedfluffy gold furcheddar cheese
Barneystealthy creeprope knotright-pawedfluffy gold furpeanut butter
Baileysonic barkplush bearright-pawedspotted white furpeanut butter
Plutostealthy creeprubber duckleft-pawedfluffy gold furcheddar cheese
Tobysuper speed digplush bearright-pawedfluffy gold furpeanut butter
Sophiehigh jumpflying frisbeeright-pawedspotted white furbacon strips
Bellamega sniffflying frisbeeleft-pawedfluffy gold furpeanut butter
Lucysonic barkflying frisbeeright-pawedcurly black furpeanut butter
Totohigh jumpflying frisbeeright-pawedfluffy gold furbacon strips
Busterhigh jumpsqueaky ballright-pawedspotted white furbacon strips
Otismega sniffsqueaky ballleft-pawedcurly black furpeanut butter
Daisysonic barkrubber duckleft-pawedcurly black furbacon strips
Snoopysonic barksqueaky ballright-pawedfluffy gold furpeanut butter
Coopermega sniffsqueaky ballright-pawedfluffy gold furbacon strips
Charliehigh jumpplush bearleft-pawedcurly black furpeanut butter
Clue 1

Place value

To open the locked suspect gate, we must find the digit in the tens place of the dog house security code.

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
900
800
200
6000
70
30
30
40
70
20
3000
7000
200
50
20
7000
T
900
400
30
40
80
300
70
T
900
800
40
400
30
9000
50
800
1000
200
40
700
What is the value of the 9 in 914?T
What is the value of the 5 in 7,850?S
What is the value of the 8 in 3,283?Y
What is the value of the 3 in 93,726?D
What is the value of the 7 in 7,148?O
What is the value of the 4 in 2,149?A
What is the value of the 4 in 466?P
What is the value of the 8 in 863?H
What is the value of the 3 in 2,637?L
What is the value of the 2 in 4,024?N
What is the value of the 1 in 1,925?B
What is the value of the 3 in 8,370?W
What is the value of the 7 in 8,789?R
What is the value of the 9 in 9,000?U
What is the value of the 2 in 7,250?E
What is the value of the 6 in 26,304?V
What is the value of the 7 in 572?I
0/17 letters found
Clue 2

Addition

Ranger Pete adds up all the muddy paw prints found on the grass to track the dog's 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.

T
3881
5391
6876
2557
9401
2557
7286
6876
2844
T
3881
7286
4885
9825
4544
T
3881
3892
3304
2557
8784
3304
3538
6876
3865
7507
3304
4885
9825
2392
5391
T
3881
7286
3304
3892
2199 + 1682 =T
3907 + 2969 =E
1185 + 1372 =S
5317 + 3467 =M
3060 + 1484 =N
1473 + 2065 =D
6472 + 3353 =I
1999 + 1305 =A
1421 + 1423 =C
2941 + 4566 =Y
2921 + 1964 =R
2207 + 3184 =H
3313 + 6088 =U
1199 + 1193 =G
4465 + 2821 =P
1709 + 2183 =W
2511 + 1354 =B
0/17 letters found
Clue 3

Rounding

The park radar only shows the rounded distance to the runaway's hideout, so we must round the number.

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
230
70
30
T
230
70
7000
30
170
900
T
230
290
500
500
30
430
T
230
290
3000
7000
700
2000
500
30
9000
2900
2300
T
230
1300
2300
T
230
T
230
30
90
Round 234 to the nearest tenT
Round 66 to the nearest tenH
Round 1,321 to the nearest hundredB
Round 1,800 to the nearest thousandK
Round 741 to the nearest hundredC
Round 500 to the nearest hundredP
Round 87 to the nearest tenR
Round 2,309 to the nearest hundredU
Round 8,616 to the nearest thousandA
Round 170 to the nearest tenF
Round 27 to the nearest tenE
Round 2,922 to the nearest hundredN
Round 426 to the nearest tenD
Round 292 to the nearest tenO
Round 6,723 to the nearest thousandI
Round 897 to the nearest hundredS
Round 2,573 to the nearest thousandL
0/17 letters found
Clue 4

Subtraction

We subtract the stolen treats from the full jar to see how many the suspect left behind.

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
3522
3528
3938
3677
6406
4522
7473
3938
6798
6406
3938
3938
2079
7792
3677
6798
7473
3938
6406
6065
4455
3017
3017
1401
3528
2478
2199
3528
4522
3528
6922 - 3400 =W
10706 - 3908 =L
5127 - 2110 =T
2951 - 752 =C
9604 - 3198 =U
8929 - 1137 =G
3870 - 1392 =S
5919 - 1464 =A
7281 - 2759 =N
3740 - 63 =O
11848 - 4375 =D
2871 - 792 =Y
4394 - 866 =E
4880 - 942 =F
5759 - 4358 =H
8737 - 2672 =R
0/16 letters found
Clue 5

Division facts (1-12) — the last clue

We divide a pack of reward biscuits equally among the helpful park pups to keep them searching.

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
100 ÷ 10 = ?
144 ÷ 12 = ?
10 ÷ 2 = ?
18 ÷ 3 = ?
7 ÷ 7 = ?
77 ÷ 11 = ?
24 ÷ 3 = ?
66 ÷ 6 = ?
48 ÷ 12 = ?
18 ÷ 6 = ?
14 ÷ 7 = ?
Step 2 — cross out the sentence with each answer
1.The villain lets out a loud sonic bark, then chews on a rubber duck.
2.The villain creeps quietly through the grass, then chews on a rubber duck.
3.The villain leaps over the clubhouse fence, then catches a flying frisbee.
4.The villain leaps over the clubhouse fence, then chews on a rubber duck.
5.The villain sniffs out the hidden golden prize, then catches a flying frisbee.
6.The villain digs a deep hole under the wall, then squeaks a rubber ball.
7.The villain digs a deep hole under the wall, then hugs a plush bear.
8.The villain lets out a loud sonic bark, then catches a flying frisbee.
9.The villain creeps quietly through the grass, then tugs a rope knot.
10.The villain lets out a loud sonic bark, then squeaks a rubber ball.
11.The villain lets out a loud sonic bark, then tugs a rope knot.
12.The villain leaps over the clubhouse fence, then tugs a rope knot.
Solve it

Name the culprit

Choose the one suspect left standing.

About this mystery

Grade level
Grade 4 math
Math topics
Place value, Addition, Rounding, Subtraction, Division
Reading level
grades 3-4
Theme
The Golden Bone Heist — set in Bark City Park Clubhouse
Format
Interactive online & printable worksheet with answer key
Solution
One unique, verified culprit among 21 suspects

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