Leap years and 29 February birthdays
Tests: 5 of 11 right · Exam: 0 of 4 right · Kind: ★ · Understood: 7 of 15 · Run: 2026-10-18, commit f3c23ea72
Lesson 112 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 · ★ · right ✓
Olivia's mate: "Born on 29 Feb 2016? So you're only 2, lol." What's the truth?
- 1. She's 2, because she's had two real birthdays — score 3
- 2. She's 5, because birthdays come every 2 years — no support
- 3. She's 10; she gets a year older every year — ← Mova's choice · ✓ the right answer · score 5
- 4. She's 40, because each birthday counts 4 years — no support
Why: It took the question to ask which statement is true. It chose option 3 with score 5, against 3 for the next best. Its support: lesson 112, line 4: «People born on 29 February, called leaplings, have their real birthday date only once every 4 years, but they still grow one year older every year. Olivia, bor…», reached through the same lesson line as the sentence the question matched. What matched: the same doer «olivia» (+3); the same thing acted on «10» (+2). · the question and its options parsed, with trees and pragmatics
Test 2 · ★ · wrong ✗
Ravi checks: "2028 ÷ 4 = 507, leap year, yes!" Then 2100 ÷ 4 = 525. "Leap year too!" What did he forget?
- 1. 2100 is too far away to count — ← Mova's choice · no support
- 2. Leap years only happen in even centuries — no support
- 3. Years ending in 00 must also divide by 400 — ✓ the right answer · no support
- 4. Nothing; 2100 is a leap year — 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 ✓
Ravi: "1900 wasn't a leap year but 2000 was? That's just mean." What's the real reason?
- 1. The rule keeps the calendar matched to the Sun — ← Mova's choice · ✓ the right answer · no support
- 2. 2000 was special because of fireworks — no support
- 3. The rule was invented in 1950 — no support
- 4. Someone forgot about 1900 by mistake — 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 ✗
Grace: "A leap year has an extra week." Her mate: "Nah, an extra month." Who's right?
- 1. Both; it adds a week and a month — ← Mova's choice · no support
- 2. Grace; it has an extra week — no support
- 3. Neither; it has one extra day — ✓ the right answer · no support
- 4. The mate; it has an extra month — 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 5 · ★ · right ✓
Ciara's gran: "Back in my day 29 Feb was the only day a girl could propose, what craic!" What is true today?
- 1. Only men may propose on 29 February — no support
- 2. It is still the law in Ireland — score 3
- 3. Proposals made on any other day still do not count — score 2
- 4. It's an old custom; anyone can propose any day — ← Mova's choice · ✓ the right answer · score 7
Why: It took the question to ask who or what does it. It chose option 4 with score 7, against 3 for the next best. Its support: lesson 112, line 16: «An old custom, said to come from Ireland, says a woman may propose marriage on 29 February; today anyone can propose on any day.», reached through the remembered sentence the question matched. What matched: it fills the role the question asks for (+3); the same property (+2); the same action «propose» (+1); the same doer «anyone» (+1). · the question and its options parsed, with trees and pragmatics
Test 6 · ★ · right ✓
Tanvir: "A leapling born in 2016, how old on their 4th real birthday?" His mate says, "4, ya eejit." Who's right?
- 1. Nobody: they turn 8 — no support
- 2. Nobody: they turn 20 — no support
- 3. The mate: they turn 4, one per real birthday — no support
- 4. Tanvir's sum: they turn 16 in 2032 — ← Mova's choice · ✓ the right answer · score 5
Why: It took the question to ask what something is like. It chose option 4 with score 5, the only option with support. Its support: lesson 112, line 14: «A leapling born in 2016 has real 29 February birthdays in 2020, 2024, 2028 and 2032, and turns 16 on the fourth of them.», reached through the same lesson line as the sentence the question matched. What matched: the same action «turn» (+4); the same thing acted on «16» (+2). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics
Test 7 · ★ · wrong ✗
Joe: "Is there a 29 February in every school year?" What's the answer?
- 1. No, school years never contain a 29 February — ← Mova's choice · score 0
- 2. Yes, every school year has one — no support
- 3. No, only in one school year out of every 4 — ✓ the right answer · no support
- 4. Yes, but only in Scotland — no support
Why: It took the question to ask which statement is true. It chose option 1 with score 0, the only option with support. Its support: lesson 112, line 17: «Only one school year in every 4 contains a 29 February: the school year from September 2027 to July 2028 does, and the one from September 2026 to July 2027 doe…», reached through the option's own match among the sentences about the question's things. What matched: the same action «contain» (+2); the same doer «one school year» (+1). Against it: one says «not», the other does not (counts against) (-3). The right option, 3, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Test 8 · ★ · wrong ✗
Jade: "No leap years for 100 years and we'd be about 25 days out." Is that roughly right?
- 1. No, about 100 days out — ← Mova's choice · no support
- 2. No, nothing would change at all — no support
- 3. No, only about 6 hours out — no support
- 4. Yes, about 24 to 25 days — ✓ 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
Test 9 · ★ · right ✓
What would happen if we added a leap day every single year?
- 1. The calendar would match the Sun perfectly — no support
- 2. February would vanish completely — no support
- 3. The calendar would run ahead of the Sun very quickly — ← Mova's choice · ✓ the right answer · score 3
- 4. Every year would have 365 days — no support
Why: It took the question to ask what happens next. It chose option 3 with score 3, the only option with support. Its support: lesson 108, line 17: «When time runs across midnight, count to midnight first and then add the time after it: 9:45 pm to 7:15 am is 9 hours 30 minutes.», reached through the same lesson line as the sentence the question matched. What matched: the same action «run» (+2); the same circumstance (+2). Against it: a different doer (counts against) (-1). · the question and its options parsed, with trees and pragmatics
Test 10 · ★ · wrong ✗
Ewan's mum, highkey annoyed: "Brilliant, a whole extra day in February for nothing." Why does she say it?
- 1. She must pay a tax on 29 February — score 1
- 2. Leap days are always bank holidays — no support
- 3. February has fewer days in a leap year — ← Mova's choice · score 7
- 4. Her pay is the same each month, but she works one more day — ✓ the right answer · score 4
Why: It took the question to ask why something happens (its cause). It chose option 3 with score 7, against 4 for the next best. Its support: lesson 111, line 9: «February has 28 days, or 29 in a leap year.», reached through the option's own match among the sentences about the question's things. What matched: the same light verb (be, have, do, get, go) (+3); the same doer «february» (+2); the same property (+2). The right option, 4, scored 4. · the question and its options parsed, with trees and pragmatics
Test 11 · ★ · wrong ✗
A cartoon says leap years exist "so February isn't lonely". Put it right.
- 1. They exist to give people a free holiday — ← Mova's choice · no support
- 2. They exist because the Moon is late every year — no support
- 3. They exist because February is the shortest month — no support
- 4. They keep the calendar in step with the Earth's trip round the Sun — ✓ 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 ✗
Determine the number of days comprised in a leap year.
- 1. Three hundred and sixty-five — ← Mova's choice · no support
- 2. Three hundred and sixty-seven — no support
- 3. Three hundred and seventy-two — no support
- 4. Three hundred and sixty-six — ✓ 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 2 · formal language · wrong ✗
Identify the principal reason for which the year 1900 was not designated a leap year.
- 1. It is not exactly divisible by 4 — score 3
- 2. Leap years were not instituted until after 1900 — ← Mova's choice · score 6
- 3. It was omitted owing to an administrative error — no support
- 4. It concludes in 00 and is not exactly divisible by 400 — ✓ the right answer · no support
Why: It took the question to ask which statement is true. It chose option 2 with score 6, against 3 for the next best. Its support: lesson 112, line 3: «The extra 6 hours is a little too much: the real year is about 365 days, 5 hours and 49 minutes. So there is a rule inside the rule: years ending in 00 are lea…», reached through the remembered sentence the question matched. What matched: the same circumstance (+4); the same thing acted on «leap year» (+2). The right option, 4, found no support in what it remembers. · the question and its options parsed, with trees and pragmatics
Exam question 3 · formal language · wrong ✗
Whereas a person was born upon 29 February 2016, ascertain the age attained upon the fourth occurrence thereafter of that date.
- 1. Twelve full years — ← Mova's choice · no support
- 2. Four years — no support
- 3. Eight years — no support
- 4. Sixteen years — ✓ 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 duration of the Earth's revolution around the Sun.
- 1. Approximately 360 days and 6 hours — ← Mova's choice · no support
- 2. Approximately 365 days, 5 hours and 49 minutes — ✓ the right answer · no support
- 3. Precisely 365 days — no support
- 4. Precisely 366 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
This page in Markdown → https://md.mova.elamur.ai/free/en/school-run/world/112-leap-years-and-29-february-birthdays/