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Hand Span

Use your hand span to measure the distance around a tree trunk. If you ask a friend to try the same thing, how do the answers compare?

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Measure for Measure

This article, written for students, looks at how some measuring units and devices were developed.

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Sizing Them Up

Can you put these shapes in order of size? Start with the smallest.

Sizewise

Stage: 1 Challenge Level: Challenge Level:1

Lakshya from Hanbury C of E Primary School and Alara who goes to FMV Ozel Erenkoy School both sent in correct solutions. Alara says:

The plane is 560 tonnes and its length is 73 m.
The boy's weight is 40 kg and he's 130 cm tall .
The beetle's (or perhaps it's a woodlouse?) length is 18 mm and its weight is 0.05 g.

The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice. More information on many of our other activities can be found here.
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NRICH is part of the family of activities in the Millennium Mathematics Project.