Math Crackers
🔎 The kid oil robery the polisGrade 5Reading: grades 5-6SubtractionAdditionPlace valueFractions of a number

The Great Kid Oil Robbery

Chief Joshua Dax Zeno blew his whistle! Someone broke into the central vaults of Slick City and stole the super-slick Kid Oil, the famous formula that keeps the kids' go-karts racing faster than lightning. We need to track down the slickest oil bandit in town before the big championship race 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
NameRacing EngineSecret GadgetRacing GogglesHair StyleFoil Weapon
Speedy SamSlick Oil SprayerSticky Goop LauncherWears Blue Racing GogglesSpiky Green MohawksAllergic to Bubblegum
Oily OliverSuper Turbo EngineDeployable Spike StripsWears Red Racing GogglesBright Orange BraidsSlippery on Banana Peels
Piston PeteSuper Turbo EngineHigh-Speed Grapple HookWears Blue Racing GogglesBright Orange BraidsAllergic to Bubblegum
Turbo TinaHeavy Cargo CraneHigh-Speed Grapple HookWears Red Racing GogglesNeon Blue SpikesSlippery on Banana Peels
Nitro NedGlider Flight WingsSticky Goop LauncherWears Blue Racing GogglesNeon Blue SpikesAllergic to Bubblegum
Racer RachelHeavy Cargo CraneSonic Siren JammerWears Red Racing GogglesNeon Blue SpikesSlippery on Banana Peels
Spike SpencerSuper Turbo EngineSticky Goop LauncherWears Red Racing GogglesNeon Blue SpikesSlippery on Banana Peels
Ignition IrisMagnetic Tow HookGlow-in-the-Dark HeadlightsWears Red Racing GogglesNeon Blue SpikesSlippery on Banana Peels
Axle AbbySlick Oil SprayerGlow-in-the-Dark HeadlightsWears Red Racing GogglesNeon Blue SpikesSlippery on Banana Peels
Fuel MarySlick Oil SprayerHigh-Speed Grapple HookWears Blue Racing GogglesBright Orange BraidsScared of Cute Puppies
Gasket GailMagnetic Tow HookSonic Siren JammerWears Blue Racing GogglesNeon Blue SpikesSlippery on Banana Peels
Bumper BobSlick Oil SprayerSonic Siren JammerWears Red Racing GogglesBright Orange BraidsAllergic to Bubblegum
Greasy GregGlider Flight WingsDeployable Spike StripsWears Red Racing GogglesBright Orange BraidsAllergic to Bubblegum
Drift DianeHeavy Cargo CraneHigh-Speed Grapple HookWears Red Racing GogglesNeon Blue SpikesAllergic to Bubblegum
Skidmark SeanHeavy Cargo CraneSticky Goop LauncherWears Blue Racing GogglesBright Orange BraidsAllergic to Bubblegum
Wrenchy WillSlick Oil SprayerSticky Goop LauncherWears Red Racing GogglesNeon Blue SpikesSlippery on Banana Peels
Crankcase ChrisSuper Turbo EngineSticky Goop LauncherWears Blue Racing GogglesNeon Blue SpikesScared of Cute Puppies
Exhaust ElsaSlick Oil SprayerSonic Siren JammerWears Red Racing GogglesBright Orange BraidsSlippery on Banana Peels
Slick SallySlick Oil SprayerHigh-Speed Grapple HookWears Blue Racing GogglesNeon Blue SpikesScared of Cute Puppies
Revving RoyGlider Flight WingsDeployable Spike StripsWears Blue Racing GogglesSpiky Green MohawksAllergic to Bubblegum
Chassis CharlieSlick Oil SprayerHigh-Speed Grapple HookWears Blue Racing GogglesNeon Blue SpikesAllergic to Bubblegum
Clue 1

Subtraction

Chief Joshua Dax Zeno inspects the main warehouse. We had a huge inventory of oil barrels, but several are now missing. If we subtract the remaining count from the original stock, we can determine the 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
3492
4667
8656
T
3492
4667
3639
8656
5534
7494
8921
8656
5051
6340
8921
T
3492
4575
5051
8656
T
3492
4667
8656
6917
8921
8921
1241
4574
7308
4575
6340
6682
4667
8656
6964
6996 - 3504 =T
10240 - 3900 =N
5337 - 4096 =P
5706 - 1132 =L
8621 - 3570 =S
4622 - 47 =U
6553 - 2914 =I
7070 - 106 =R
11178 - 3684 =D
8995 - 3461 =F
11724 - 4416 =A
10077 - 1421 =E
7294 - 612 =C
11462 - 2541 =O
6257 - 1590 =H
10950 - 4033 =G
0/16 letters found
Clue 2

Addition

Our patrol officers are gathering stray oil cans dropped along the highway escape route. We need to add up the cans found on the grass and the pavement to unlock this 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.

R
4361
9803
6237
4634
6020
4634
4634
5027
9803
7242
6516
9803
R
4361
9803
7242
2904
6020
2704
2704
9803
6237
8053
2704
2704
5669
9803
5669
9803
6484
7242
2704
3032 + 1329 =R
1776 + 2858 =G
1193 + 1711 =P
4105 + 5698 =E
3727 + 2293 =O
2740 + 2929 =H
1656 + 3371 =L
3991 + 4062 =A
3828 + 3414 =S
4374 + 2110 =I
3665 + 2572 =D
1664 + 1040 =T
3014 + 3502 =W
0/13 letters found
Clue 3

Place value

The bandit locked the vault keypad with a digital code. The display screen is glitching and only showing a massive number. We must use place value to find the correct digit to reveal our next 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
7000
3000
700
2000
600
30
30
6000
600
4000
8000
30
600
20
20
700
400
200
4000
6000
70
6000
4000
6000
4000
6000
20
700
700
30
What is the value of the 7 in 67,054?T
What is the value of the 3 in 286,630?L
What is the value of the 4 in 774,821?N
What is the value of the 8 in 638,263?S
What is the value of the 4 in 97,421?D
What is the value of the 3 in 53,962?H
What is the value of the 2 in 48,268?O
What is the value of the 2 in 62,301?V
What is the value of the 6 in 184,618?I
What is the value of the 6 in 286,418?A
What is the value of the 2 in 44,728?P
What is the value of the 7 in 22,792?E
What is the value of the 7 in 38,274?B
0/13 letters found
Clue 4

Fractions of a number

A witness saw the bandit load some loot onto a getaway truck. The truck could only carry a small fraction of the heavy cargo. Let us calculate that fraction of the total weight to narrow down our suspects.

Solve each problem to learn its letter. Then write that letter in every box that shows the same number, and read the secret clue.

N
39
40
28
N
39
17
26
18
40
29
10
23
11
22
24
2
23
27
37
26
18
N
39
14
4
28
4
24
40
14
40
2
27
29
1/3 of 117 =N
2/6 of 111 =C
2/4 of 44 =Y
2/10 of 10 =A
1/6 of 108 =U
8/10 of 30 =H
4/8 of 58 =S
1/4 of 160 =E
3/4 of 36 =R
5/10 of 52 =L
2/4 of 22 =K
1/8 of 112 =G
1/6 of 102 =B
2/10 of 20 =T
2/3 of 15 =P
2/6 of 84 =O
2/8 of 92 =I
0/17 letters found
Clue 5

Fractions of a number — the last clue

The bandit vehicle is leaking fuel as they speed away. Chief Joshua Dax Zeno estimates they have used a fraction of their gas tank. Finding that fraction of the tank capacity will help us locate the thief.

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
1/6 of 72 = ?
1/4 of 20 = ?
1/8 of 16 = ?
1/5 of 20 = ?
5/10 of 20 = ?
1/8 of 64 = ?
1/8 of 24 = ?
2/6 of 18 = ?
7/8 of 8 = ?
2/4 of 18 = ?
1/8 of 88 = ?
Step 2 — cross out the sentence with each answer
1.The villain swung a magnetic tow hook, then turned on glow-in-the-dark headlights.
2.The villain hoisted a heavy cargo crane, then shot a high-speed grapple hook.
3.The villain revved up a super turbo engine, then scattered deployable spike strips.
4.The villain unleashed glider flight wings, then blasted a sonic siren jammer.
5.The villain hoisted a heavy cargo crane, then blasted a sonic siren jammer.
6.The villain sprayed slick oil everywhere, then fired a sticky goop launcher.
7.The villain revved up a super turbo engine, then fired a sticky goop launcher.
8.The villain swung a magnetic tow hook, then fired a sticky goop launcher.
9.The villain sprayed slick oil everywhere, then blasted a sonic siren jammer.
10.The villain revved up a super turbo engine, then shot a high-speed grapple hook.
11.The villain sprayed slick oil everywhere, then scattered deployable spike strips.
12.The villain sprayed slick oil everywhere, then turned on glow-in-the-dark headlights.
Solve it

Name the culprit

Choose the one suspect left standing.

About this mystery

Grade level
Grade 5 math
Math topics
Subtraction, Addition, Place value, Fractions of a number
Reading level
grades 5-6
Theme
The Great Kid Oil Robbery — set in Slick City Go-Kart Arena
Format
Interactive online & printable worksheet with answer key
Solution
One unique, verified culprit among 21 suspects

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