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Description
How Long is a Piece of String?A fascinating book, from a leading maths educator and demystifier, that shows how maths is relevant to our everyday lives. Have you ever wondered how the meter in a taxi works? Or why a lift takes so long to respond to your call? Is there a mathematical secret to making a hit single? And how long is a piece of string? In this fascinating book, you will find the answers to these and many other intriguing questions of everyday life. Discover the
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.2 ★★★★★
Based on 1161 reviews
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Product Reviews
★★★★★ 2
poor marketing ring much smaller than photographed
Gem Type: Created Turquoise, Ring Size: 9
very tiny misleading photo
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 3, 2026
★★★★★ 3
Rock does not lay flat on finger
Gem Type: Created Turquoise, Ring Size: 6, Gem Type: Created Turquoise, Ring Size: 6
Beautiful ring but not for me. The rock did not lay flat on my finger and I was worried it would get caught on everything and break. Mom of two and its not something I want to worry about . So I returned mine
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 25, 2021
★★★★★ 1
Pretty blue but stone is too thin.
Gem Type: Created Turquoise, Ring Size: 8
Beautiful blue but too thin and fragile
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 16, 2021
★★★★★ 5
Perfect
Gem Type: Created Turquoise, Ring Size: 7
It is exactly what i wanted. Great quality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 8, 2021
★★★★★ 5
I smile when I look at a happy bright colour 😊
Gem Type: Created Turquoise, Ring Size: 7
A very happy ring
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2021
