I love fiction too.
The opening flight of fancy set the tone as the writer, almost palpably breathless, (which happens at altitude sometimes or in any situation where there's a lack of oxygen) recitates near fact. Near fact one? The boy was "arrested because school officials thought it looked like a bomb".
I'm pretty sure it was an English teacher's complaint that simply led to the police being called and following a thoughtless protocol that never should have advanced as it did.
But then you know an author is getting serious when we arrive at "points".
1. Why did Ahmed claim to build the clock if he didn’t actually build it?
The author mostly deflates this one in his own opening on the point with,
"From the beginning we’ve been told that Ahmed—a supposedly creative, clever, inventive young man—threw the clock together from parts in his bedroom in order to “impress” his teachers at school".
Forgetting the attitude suggested by "supposedly" we should stop to ask what throwing a clock together from parts entails. But our author doesn't do that. :nono: What he does instead is speculate with the force of fact:
As it turns out, it’s almost certain he did no such thing. All the evidence points toward the conclusion that Ahmed didn’t build his clock at all, and instead just took apart an old digital clock and put the guts inside a pencil case.
The speculation that speculation rests on was from an anonymous fellow who couldn't get the decade right on the parts but felt good deciding that's what happened since it could have happened and the kid obviously didn't fabricate the parts himself.

lain: Which the kid never claimed to have done. And what we're left with is as easily explained by him taking parts and putting them together as anything else. Not an MIT project, to be sure.
Why would a 14 year old boy, wanting to impress his instructors, call the thing an invention instead of a cobbling? Why indeed. Well, obviously for some nefarious purpose. Because it if wasn't then we'd be left with the highly implausible answer that a) he's fourteen and b) he put it in the most self-flattering way possible because c) he's fourteen and d) he wanted to impress his teacher.
2. At what point was the clock actually built?
This isn't actually of any relevance at all, but it does allow the author to tag it with,
He thus had the clock in his possession for around 12 hours, give or take.
The thus and possession really underscore the gravity of cobbling and holding on to what you cobbled.
Worse! Ahmed's father said something about his son waking up to the clock every morning....but Ahmed said he only just built it!! What could this mean? Maybe Ahmed took that same clock apart right before taking it to school!!!!!!!!!
Or maybe dad was thinking about the clock he wakes up with and goofed. Or maybe Ahmed used some part from that clock. Or maybe Ahmed just gutted the old clock and tried to make it look like he did more work than he actually did, which is pretty damning stuff...if he turned it in for a grade. Else, worse case, not so much.
3. Why did the clock go off during his English class?
I'm guessing it had something to do with a timer.

lain:
When Ahmed showed the clock to one teacher, that teacher said he should not show it to anyone else (the teacher apparently thought it looked suspicious)
Or the teacher knew the English teacher Ahmed had and was trying to head off the potential for lunacy.
So the alarm went off and the teacher heard it. That’s a suitable pretext for showing her the clock, but it’s also—when you stop to think about it—really quite odd.
Pretext...or, less sinister, reason. And no, it's not odd. It's just sloppy, or inattentive, which can happen with 14 year olds.
Left on the floor, unconsidered, the first teacher set the timer to screw around with the English teacher! :shocked:
4. To what extent has Ahmed’s sister, Eyman, been involved in the whole affair?
Affair? Sorry, but at this point I had to abandon the read for something less speculative by a guy named Nostradamus.

oly:
Which, sadly, made no reference at all to Ahmed's clock. :mmph: