Let's solve each of these multiplication problems step by step and identify the "trick" problem that is
not a multiplication problem.
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1) A scale model of a Boeing 747 is 5 feet long. The real plane is fifty times longer. How long is the actual plane?
This is a
multiplication problem:
$ 5 \text{ ft} \times 50 = 250 \text{ ft} $
✔ Answer: 250 feet
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2) A box of eggs holds 6 eggs. If I had 40 full boxes, how many eggs would I have?
Multiply number of boxes by eggs per box:
$ 6 \times 40 = 240 $
✔ Answer: 240 eggs
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3) A pack of 8 pens costs me £12. I buy 20 packs. How many pens have I bought?
We are asked for the
number of pens, not the cost.
Each pack has 8 pens → $ 8 \times 20 = 160 $ pens
✔ Answer: 160 pens
> Note: The price (£12) is extra information — we don’t need it.
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4) A box of chocolates contains 30 chocolates. How many chocolates in 9 boxes?
$ 30 \times 9 = 270 $
✔ Answer: 270 chocolates
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5) How many days in 40 weeks?
There are 7 days in a week → $ 7 \times 40 = 280 $
✔ Answer: 280 days
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6) A paperclip is made from 10cm of wire. How many paperclips could be made from 2m of wire?
First, convert meters to centimeters:
$ 2 \text{ m} = 200 \text{ cm} $
Now divide total wire by wire per paperclip:
$ 200 \div 10 = 20 $
⚠️ This is a
division problem, not multiplication!
✘ Not a multiplication problem! → This is the
"trick" problem
✔ Answer: 20 paperclips (but solved via division)
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7) A ream contains 500 sheets of paper. How many sheets in 3 reams?
$ 500 \times 3 = 1500 $
✔ Answer: 1500 sheets
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8) How many seconds in 6 minutes?
There are 60 seconds in a minute → $ 60 \times 6 = 360 $
✔ Answer: 360 seconds
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✔ Final Answers:
1. 250 feet
2. 240 eggs
3. 160 pens
4. 270 chocolates
5. 280 days
6. 20 paperclips (this is the
trick problem – it's
division)
7. 1500 sheets
8. 360 seconds
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🔍 The "Trick" Problem:
👉
Problem #6 is the trick one because it involves
division, not multiplication.
Even though you're using multiplication facts (knowing 10 × 20 = 200), the operation required is
division:
$$
\frac{200 \text{ cm}}{10 \text{ cm per paperclip}} = 20 \text{ paperclips}
$$
So, while multiplication is involved in understanding the relationship, the core operation is
division.
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🎯 Conclusion:
The
trick problem is
#6, as it is
not a multiplication problem.
✔ Answer: The trick problem is
#6.
Parent Tip: Review the logic above to help your child master the concept of math worksheet for grade 4 multiplication.