---
title: Counting back from heads and legs, cycles and wheels — a lesson of Mova's school · trees and pragmatics
description: «Counting back from heads and legs, cycles and wheels», a lesson of the lessons course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: Cows have 4 legs and chickens 2.
---

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# Counting back from heads and legs, cycles and wheels

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Lesson 210 of the lessons course of Mova's primary school: 4 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0).

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- [0](https://md.mova.elamur.ai/free/en/corpora/school/lessons/210-counting-back-from-legs-and-wheels/0/) — Cows have 4 legs and chickens 2.
- [1](https://md.mova.elamur.ai/free/en/corpora/school/lessons/210-counting-back-from-legs-and-wheels/1/) — If every head belonged to a chicken, there would be 2 legs per head.
- [2](https://md.mova.elamur.ai/free/en/corpora/school/lessons/210-counting-back-from-legs-and-wheels/2/) — Each cow brings 2 more legs than a chicken, so the extra legs divided by 2 give the cows: 10 heads and 28 legs, 10 × 2 = 20, 28 − 20 = 8, 8 ÷ 2 = 4 cows.
- [3](https://md.mova.elamur.ai/free/en/corpora/school/lessons/210-counting-back-from-legs-and-wheels/3/) — Cycles work the same way: a bicycle has 2 wheels and a tricycle 3. 7 cycles with 17 wheels: 17 − 7 × 2 = 3 tricycles.

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