---
title: A covering of lily pads doubles daily and completes the pond on the… — Olympiad: everyday reasoning ★★★ · tree and pragmatics
description: A covering of lily pads doubles daily and completes the pond on the thirtieth day. Identify the day on which the pond was half covered. Exam question 4 of lesson 194 «Olympiad: everyday reasoning ★★★» of the world course of Mova's primary school, with the dependency tree and pragmatics of the questi
---

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# Exam question 4 · Olympiad: everyday reasoning ★★★

<!-- .ven lang=en -->
A covering of lily pads doubles daily and completes the pond on the thirtieth day. Identify the day on which the pond was half covered.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 4 · wrong ✗ · **Who acts:** covering, you · **What happens:** double, complete, identify, cover · **To what, where:** pond

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This is exam question 4 of lesson 194 «Olympiad: everyday reasoning ★★★» of the world course of Mova's primary school, asked in stiff, formal language. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/world/194-olympiad-everyday-reasoning/#e4).

## The question {#question}

<!-- .note -->
*Sentence 1:* A covering of lily pads doubles daily and completes the pond on the thirtieth day.

```conllu
# sent_id = question:world:194-olympiad-everyday-reasoning:e4:1
# text = A covering of lily pads doubles daily and completes the pond on the thirtieth day.
1	A	a	DET	DT	Definite=Ind|PronType=Art	2	det	_	_
2	covering	covering	NOUN	NN	Number=Sing	6	nsubj	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	lily	lily	NOUN	NN	Number=Sing	5	compound	_	_
5	pads	pad	NOUN	NNS	Number=Plur	2	nmod	_	_
6	doubles	double	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
7	daily	daily	ADV	RB	_	6	advmod	_	_
8	and	and	CCONJ	CC	_	9	cc	_	_
9	completes	complete	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	6	conj	_	_
10	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
11	pond	pond	NOUN	NN	Number=Sing	9	obj	_	_
12	on	on	ADP	IN	_	15	case	_	_
13	the	the	DET	DT	Definite=Def|PronType=Art	15	det	_	_
14	thirtieth	thirtieth	ADJ	JJ	Degree=Pos	15	amod	_	_
15	day	day	NOUN	NN	Number=Sing	9	obl	_	SpaceAfter=No
16	.	.	PUNCT	.	_	6	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **double** | present | a covering of lily pads |  |  |  |  | daily *property* | vn other\_cos-45.4 «NP.patient V»: agent=Patient |
| 2 | **complete** | present | a covering of lily pads *not said here* | the pond |  |  | day |  | vn complete-55.2 «NP V NP»: agent=Agent pond=Eventuality |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

<!-- .note -->
*Sentence 2:* Identify the day on which the pond was half covered.

```conllu
# sent_id = question:world:194-olympiad-everyday-reasoning:e4:2
# text = Identify the day on which the pond was half covered.
1	Identify	identify	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	day	day	NOUN	NN	Number=Sing	1	obj	_	_
4	on	on	ADP	IN	_	5	case	_	_
5	which	which	PRON	WDT	PronType=Rel	10	obl	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	pond	pond	NOUN	NN	Number=Sing	10	nsubj:pass	_	_
8	was	be	AUX	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	10	aux:pass	_	_
9	half	half	ADV	RB	NumForm=Word|NumType=Frac	10	advmod	_	_
10	covered	cover	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	3	acl:relcl	_	SpaceAfter=No
11	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **identify** | imperative | you *not said here* |  |  |  | day |  | vn empathize-88.2 «NP V»: agent=Experiencer |
| 2 | **cover** | past · passive |  | the pond |  |  | on the day | half *property* | vn fill-9.8-1 «NP V NP»: subject=Destination |

## The options {#options}

### Option 1 · ← Mova's choice {#o1}

<!-- .ven lang=en -->
The first

```conllu
# sent_id = question:world:194-olympiad-everyday-reasoning:e4:o1:1
# text = The first
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	first	first	ADJ	JJ	Degree=Pos|NumForm=Word|NumType=Ord	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 2 {#o2}

<!-- .ven lang=en -->
The fifteenth

```conllu
# sent_id = question:world:194-olympiad-everyday-reasoning:e4:o2:1
# text = The fifteenth
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	fifteenth	fifteenth	NOUN	NN	Number=Sing	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 3 {#o3}

<!-- .ven lang=en -->
The twenty-eighth

```conllu
# sent_id = question:world:194-olympiad-everyday-reasoning:e4:o3:1
# text = The twenty-eighth
1	The	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
2	twenty	twenty	NUM	CD	NumForm=Word|NumType=Card	4	nummod	_	SpaceAfter=No
3	-	-	PUNCT	HYPH	_	2	punct	_	SpaceAfter=No
4	eighth	eighth	NOUN	NN	Number=Sing	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 4 · ✓ the right answer {#o4}

<!-- .ven lang=en -->
The twenty-ninth

```conllu
# sent_id = question:world:194-olympiad-everyday-reasoning:e4:o4:1
# text = The twenty-ninth
1	The	the	DET	DT	Definite=Def|PronType=Art	4	det	_	_
2	twenty	twenty	NUM	CD	NumForm=Word|NumType=Card	4	nummod	_	SpaceAfter=No
3	-	-	PUNCT	HYPH	_	2	punct	_	SpaceAfter=No
4	ninth	ninth	NOUN	NN	Number=Sing	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

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- ← previous: [Olympiad: everyday reasoning ★★★, exam 3](https://md.mova.elamur.ai/free/en/corpora/questions/world/194-olympiad-everyday-reasoning/e3/)
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