How long since? Counting back
Tests: 4 of 11 right · Exam: 0 of 4 right · Kind: plain · Understood: 2 of 15 · Run: 2026-10-18, commit f3c23ea72
Lesson 108 of the world course of Mova's primary school, as Mova's small model took its tests: it had read this lesson and the ones before it and learned from their exercises. Each test shows the options in the order the student saw them, its choice, the right answer, the score of every option and why it chose. The lesson itself, sentence by sentence with trees and pragmatics: the lesson in the corpora.
Every question of this lesson and each of its options parsed by Mova, with trees and pragmatics: the lesson's questions in the corpora.
Test 1 · wrong ✗
Ali, proper mardy: "I've been waiting ages!" He came at 3:50 and it's 4:05. What's the truth?
- 1. 55 minutes — ← Mova's choice · no support
- 2. 5 minutes — no support
- 3. Only 15 minutes — ✓ the right answer · no support
- 4. Over an hour — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Test 2 · right ✓
Gran's gasping: "Not had a cuppa in hours!" Her last one was at 10:15 and it's 11:00. Is she right?
- 1. No, it's been 45 minutes — ← Mova's choice · ✓ the right answer · no support
- 2. Yes, it's been 11 hours — no support
- 3. Yes, it's been 2 hours — no support
- 4. No, it's been 15 minutes — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Test 3 · right ✓
Sophie texts, "It's been, like, a year, babe," since she saw her friend on 20 August. Today is 20 October. What's the real gap?
- 1. 2 months — ← Mova's choice · ✓ the right answer · no support
- 2. 10 months — no support
- 3. 1 year — no support
- 4. 20 days — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Test 4 · wrong ✗
Dad: "I put the kettle on a minute ago." The oven clock went from 8:03 to 8:10. What does "a minute ago" mean here?
- 1. Recently; it was really 7 minutes — ✓ the right answer · score 7
- 2. Ten minutes ago exactly — ← Mova's choice · score 8
- 3. Exactly one minute ago — score 8
- 4. Eight hours ago — score 7
Why: It took the question to ask what it is done to. It chose option 2 with score 8, tied with another option at 8 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 104, line 14: «Traffic, weather and roadworks make buses late, so a live app saying "Due 3:47" for a 3:40 bus means it is about 7 minutes late.», reached through the same lesson line as the sentence the question matched. What matched: the same doer «app» (+3); it fills the role the question asks for (+3); the same thing acted on «7 minutes» (+2). The right option, 1, scored 7. · the question and its options parsed, with trees and pragmatics
Test 5 · right ✓
Asha says the 11:40 cleaning was "donkey's years ago". It's 3:10 pm. How long has it really been?
- 1. 3 hours 30 minutes — ← Mova's choice · ✓ the right answer · no support
- 2. 4 hours 10 minutes — no support
- 3. Many years — no support
- 4. 30 minutes — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Test 6 · wrong ✗
Our kid says, "Holly had a proper kip, 9:45 pm to 7:15 am, that's like 2 and a half hours." Put it right.
- 1. It's 12 hours exactly — ← Mova's choice · no support
- 2. It's 2 hours 30 minutes, he's right — no support
- 3. It's 9 hours 30 minutes, because it goes across midnight — ✓ the right answer · no support
- 4. It's 7 hours exactly — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Test 7 · wrong ✗
Mia's dog, fed at 7:30 am, whines at 1:30 pm. Mia says, "He only ate an hour ago." What should she know?
- 1. He ate 30 minutes ago — ← Mova's choice · no support
- 2. He ate 6 hours ago — ✓ the right answer · no support
- 3. He ate 1 hour ago, as she says — no support
- 4. He ate 8 hours ago — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Test 8 · wrong ✗
What would happen to Leo's phone if it kept losing about 10% an hour after 50% at 12:00?
- 1. It would be flat at about 1:00 — ← Mova's choice · score 2
- 2. It would never go flat — score 2
- 3. It would be flat at about 5:00 — ✓ the right answer · score 2
- 4. It would be flat at about 10:00 at night — score 2
Why: It took the question to ask what happens next. It chose option 1 with score 2, tied with another option at 2 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 108, line 10: «A phone at 100% at 7:00 and 50% at 12:00 lost half its charge in 5 hours, about 10% every hour.», reached through what followed the sentence the question matched. What matched: the same doer «phone» (+2). The right option, 3, scored 2. · the question and its options parsed, with trees and pragmatics
Test 9 · right ✓
Jamie's bean was planted on 2 March and sprouted on 16 March. His mate says, "A fortnight, easy." Is that right?
- 1. Yes, 14 days is a fortnight — ← Mova's choice · ✓ the right answer · no support
- 2. No, a fortnight is 10 days — no support
- 3. No, it was 16 days — no support
- 4. No, a fortnight is 4 weeks — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Test 10 · wrong ✗
Teacher: "Started at 9:20, pens down at 10:05, so you had an hour, stop whining." Was it an hour?
- 1. No, 35 minutes — ← Mova's choice · no support
- 2. No, 1 hour 25 minutes — no support
- 3. No, 45 minutes — ✓ the right answer · no support
- 4. Yes, exactly an hour — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Test 11 · wrong ✗
A cartoon detective says, "The cake was eaten at 11 pm and found at 1 am, that's 10 hours." Put him right.
- 1. It's 12 hours exactly — ← Mova's choice · no support
- 2. It's 14 hours exactly — no support
- 3. It's 10 hours, he's right — no support
- 4. It's 2 hours, counting across midnight — ✓ the right answer · no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Exam question 1 · formal language · wrong ✗
It is given that an animal was fed at 7:30 am and that the present time is 1:30 pm. Determine the interval elapsed.
- 1. Five hours — ← Mova's choice · no support
- 2. Six hours — ✓ the right answer · no support
- 3. Seven hours — no support
- 4. Four hours — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Exam question 2 · formal language · wrong ✗
Whereas a person retired at 9:45 pm and awoke at 7:15 am, ascertain the aggregate duration of sleep.
- 1. Eight hours and thirty minutes — ← Mova's choice · no support
- 2. Two hours and thirty minutes — no support
- 3. Nine hours and thirty minutes — ✓ the right answer · no support
- 4. Ten hours and thirty minutes — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Exam question 3 · formal language · wrong ✗
Identify the number of days elapsed between the second and the sixteenth day of the same month.
- 1. Eighteen — ← Mova's choice · no support
- 2. Sixteen — no support
- 3. Twelve — no support
- 4. Fourteen — ✓ the right answer · no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
Exam question 4 · formal language · wrong ✗
Select the response that is consistent with the established facts concerning the term "fortnight".
- 1. It denotes a period of forty nights — ← Mova's choice · no support
- 2. It denotes a period of two weeks — ✓ the right answer · no support
- 3. It denotes a period of four nights — no support
- 4. It denotes a period of two months — no support
Why: No option found support in what it remembers, so it guessed: it took the first option shown. · the question and its options parsed, with trees and pragmatics
This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/world/108-how-long-since-counting-back/