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S1 ICT: Computer System Components, Hardware and Software (Paper 3: challenge)
S1 ICT: Computer System Components, Hardware and Software (Paper 3: challenge)
This paper is all multi step conversion. The order is unify units, add or subtract, multiply or divide, then write a percentage. Skip a step and the answer moves by an order of magnitude.
Direct answers Check the answer against common sense afterwards: a 30 minute video cannot be 3 MB and cannot be 3 TB either.
01 Paper details (check answers afterwards)
| Item | Detail |
|---|---|
| Questions | 10 |
| Suggested time | 20 |
| Difficulty mix | Foundation 3 · Intermediate 3 · Challenge 3 · Error redo 1 |
| Chapter | Chapter: S1 ICT: Computer System Components, Hardware and Software |
| Level | S1 ICT |
02 Questions (10 items)
- Foundation1 200 photos of 3 MB each add up to how many GB, to three decimal places?
- FoundationUploading a 500 MB file at 5 MB per second takes how many seconds?
- FoundationA 8 GB card already holds 2 GB; how many MB of video still fit?
- IntermediateA 720 MB video plays at 24 MB per second; how many minutes does it last?
- IntermediateWhat does the 3-2-1 rule of backup mean?
- IntermediateA computer with 16 GB of RAM gains another 16 GB; what is the total in MB?
- ChallengeA 480 MB file compresses to 240 MB; what percentage is saved?
- ChallengeA 1 GB file downloads at 8 Mbps; roughly how many seconds does it take?
- ChallengeHow many clock cycles per second does a 3.2 GHz processor run?
- Error redoA student uses 1 GB equals 1 000 MB. How large is the error?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | 3.516 GB. | 1 200 times 3 gives 3 600 MB, and dividing by 1 024 gives 3.516 GB. |
| 2 | 100 seconds. | Time is size divided by speed, so 500 divided by 5 gives 100 when both use MB. |
| 3 | 6 144 MB. | 8 minus 2 leaves 6 GB, and 6 times 1 024 gives 6 144 MB. |
| 4 | 30 minutes. | 720 divided by 24 gives 30, and after unit matching the clip lasts 30 minutes. |
| 5 | Three copies of the data, on two different kinds of media, with one copy off site. | Three copies on the same computer is not a backup, because one failure would destroy them all. |
| 6 | 32 768 MB. | 16 plus 16 gives 32 GB, and 32 times 1 024 equals 32 768 MB. |
| 7 | 50 percent. | 480 minus 240 divided by 480 equals 0.5, measured against the original size. |
| 8 | About 1 024 seconds, or roughly 17.1 minutes. | 1 GB is 1 024 MB or 8 192 megabits, and dividing by 8 gives 1 024 seconds. |
| 9 | 3.2 times 10 to the power of 9, that is 3 200 000 000 cycles. | 1 GHz means one billion cycles per second, so 3.2 GHz means 3.2 billion. |
| 10 | It is 24 MB short per GB, about 2.34 percent. | 1024 minus 1 000 divided by 1 024 equals 0.0234, and drive makers often quote the 1 000 based figure, which is why the usable size looks smaller. |
04 What to do after marking
- After marking, redo only the wrong items and write down which step went wrong (formula, unit, or misread number).
- Repeat the same item two days later; move to the next paper only when both attempts are correct.
- Parents only need the answer and note columns; there is no need to explain every item.
Challenge questions chain capacity and time conversions: turn GB into MB, turn megabits into megabytes by dividing by 8, then divide by the size of one file or by the transfer speed. Write the units on the same line so the answer matches.Tutor Registration →
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