A farmer has some rabbits and chickens.
Altogether they have 47 heads and 140 feet.
How many rabbits and chickens are there?

## A Mathematics Lesson Starter Of The Day

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• L. Mangham, Hylands School, UK
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• Good timing! Just the starter I needed for my simultaneous equation topic. Thanks.
• The Best Maths Class Ever 7cd/M2, King Alfred's College, Oxfordshire
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• We all tried our best to find the answer by guessing. But our teacher showed us how to use simultaneous equations to get the answer quickly. A tough question for a year 7 class.
• M T, 8b/Ma1 Harris Academy Purley
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• My class was just introduced to constructing and solving linear equations at the time, and I constructed a linear equation to find a solution for this starter. I let the number of rabbits be represented by x. Then 4x + 2(total heads-x)= total number of legs.
• Simbarashe Mukumbira, Mazowe High School
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• This maths stater was just the thing I wanted before I wrote my algebra test.
• Joan Morgan, All Saints Academy Plymouth
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• Excellent starter improves students thinking skills !!- Thank you.
• Transum,
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• There are so many ways pupils could engage with this problem and possibly the most basic strategy could be one of trial and improvement. Start of by proposing that there are ten rabbits. How many chickens must there be if we know the total number of heads? What is the total number of legs if this is the case? Is that more or less than the actual number of legs? How might we change our rabbit number guess to increase or decrease the number of legs? (Increasing the number of rabbits will decrease the number of chickens and as rabbits have more legs than chickens the total number of legs will go up).
Alternatively pupils might be at the stage where they could use a spreadsheet to quickly create columns of possible rabbit and chicken numbers with another column showing the number of legs.
Some pupils may have learned the basics of JavaScript and could write a looping program to find the solution.
Other pupils may need practice using their graphic display calculator to solve this problem.
Having said all of that, there is no denying this this is a classic simultaneous equations problem that can be solved in a number of different ways.
• T.O. William-west, Premier Intl Sch., Abuja, Nigeria
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• This starter is very helpful. In fact, it is intriguing enough to direct students attention and interest to the lesson. Well done.

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Previous Day | This starter is for 23 April | Next Day

Extension question: How many rabbits and chickens are in a field if the number of legs is three times the number of heads?

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## Texas Instruments Nspire Calculator

This handheld device and companion software are designed to generate opportunities for classroom exploration and to promote greater understanding of core concepts in the mathematics and science classroom. TI-Nspire technology has been developed through sound classroom research which shows that "linked multiple representation are crucial in development of conceptual understanding and it is feasible only through use of a technology such as TI-Nspire, which provides simultaneous, dynamically linked representations of graphs, equations, data, and verbal explanations, such that a change in one representation is immediately reflected in the others.

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 Teacher, do your students have access to computers?Do they have iPads or Laptops in Lessons? Whether your students each have a TabletPC, a Surface or a Mac, this activity lends itself to eLearning (Engaged Learning).

Transum.org/go/?Start=April23

Here is the URL which will take them to a related student activity.

Transum.org/go/?to=simultaneous