📋 Mission Briefing

URGENT — For Your Eyes Only!
A mysterious package has arrived at headquarters. Inside are four unknown items labelled Item A, Item B, Item C, and Item D. The identity of each item is classified — but the weights hold the key! Your mission is to use the scales, your measuring skills, and the clues below to crack the case. Work together, record your findings, and reveal the truth!

🔍 Part 1: Clue Investigation

Read each clue carefully. Use the scales to measure your items and record the weights below.

Weigh each item and write the measurement in the table below. Use both grams (g) and kilograms (kg).

Item A: _________ g    =    _________ kg

Item B: _________ g    =    _________ kg

Item C: _________ g    =    _________ kg

Item D: _________ g    =    _________ kg

The combined weight of Item A and Item C is 1.8 kg. Do your measurements match this clue?

Show your working here:

Item B weighs 500 g less than Item C. Calculate what Item B should weigh based on your measurement of Item C.

Item C weighs _________ g    −    500 g    =    _________ g

Does this match your actual measurement of Item B?    Yes / No    (circle one)

The heaviest item weighs exactly twice as much as the lightest item. Which two items are these?

Heaviest item: Item ____    weighs _________ g

Lightest item:  Item ____    weighs _________ g

Show your calculation to check:    _________ g × 2 = _________ g

Order all four items from lightest to heaviest using your measurements.

Lightest →   Item ____   →   Item ____   →   Item ____   →   Item ____   ← Heaviest

✏️ Part 2: Reasoning & Exit Quiz

a) 2,500 g = _________ kg

b) 3.75 kg = _________ g

c) 1 kg 250 g = _________ g

A bag of apples weighs 1.2 kg and a bag of oranges weighs 850 g. What is the total combined weight in grams? What is the difference in weight between the two bags?

Total weight: _________ g     Difference: _________ g

Write 1–2 sentences explaining the strategy your group used to crack the clues.

Reason: _____________________________________________

🏆 Case Status:    Mystery SOLVED! / Still Investigating    (circle one)

🔍 Final Solution: The Mystery Objects

Congratulations, investigators! You've cracked the case! The mystery items are:

• Item A: A small book (weighs 600 g)
• Item B: A pencil case (weighs 100 g)
• Item C: A water bottle (weighs 700 g)
• Item D: A lunchbox (weighs 800 g)

Here's how the clues helped you:

• Clue 1 confirmed that the combined weight of the small book and water bottle is 1.3 kg.
• Clue 2 showed that the pencil case is 500 g lighter than the water bottle.
• Clue 3 revealed that the lunchbox is twice the weight of the pencil case.
• Clue 4 helped you order the items from lightest to heaviest.

Great teamwork! Keep practicing your measuring skills!