---
product_id: 35779529
title: "Why Pi?"
price: "£2.81"
currency: GBP
in_stock: true
reviews_count: 8
url: https://www.desertcart.co.uk/products/35779529-why-pi
store_origin: GB
region: United Kingdom
---

# Why Pi?

**Price:** £2.81
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** Why Pi?
- **How much does it cost?** £2.81 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/35779529-why-pi)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

Why Pi?: Big Questions About Math [Ball, Johnny] on desertcart.com. *FREE* shipping on qualifying offers. Why Pi?: Big Questions About Math

Review: Great Book - This was a really good book! It's got a ton of fun information about math and it's not boring, it definitely keeps the kids interested. Especially with all of the cool, colorful pictures. It's fun to have a book lying around that the kids can pick up and read about really useful information, and where all of the concepts of math that we use everyday come from. I was really happy with the seller. It's a used book, but it is in good condition.
Review: Full of info! - Bought this as a gift for my niece who loves to learn, and she absolutely loves it. Skimming through the pages I thought I should keep it for myself. Lots of knowledge and a much bigger book than I expected.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Best Sellers Rank | #1,760,240 in Books ( See Top 100 in Books ) #1,408 in Children's How Things Work Books (Books) #2,541 in Children's Math Books (Books) |
| Customer Reviews | 4.7 out of 5 stars 81 Reviews |

## Images

![Why Pi? - Image 1](https://m.media-amazon.com/images/I/71NSLTamCLL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Book
*by K***Y on August 8, 2014*

This was a really good book! It's got a ton of fun information about math and it's not boring, it definitely keeps the kids interested. Especially with all of the cool, colorful pictures. It's fun to have a book lying around that the kids can pick up and read about really useful information, and where all of the concepts of math that we use everyday come from. I was really happy with the seller. It's a used book, but it is in good condition.

### ⭐⭐⭐⭐⭐ Full of info!
*by P***S on August 7, 2021*

Bought this as a gift for my niece who loves to learn, and she absolutely loves it. Skimming through the pages I thought I should keep it for myself. Lots of knowledge and a much bigger book than I expected.

### ⭐⭐⭐⭐⭐ Great for kids and adults
*by J***N on April 22, 2016*

Our six year old son absolutely adores reading this book (and others by the same author) at bedtime. Every page is a fascinating combination of mathematical facts, historical context and interesting problems. The fact that my wife and I look forward to reading it as much as our son does is remarkable. We're buying everything written by Johnny Ball.

## Frequently Bought Together

- Why Pi?: Big Questions About Math
- Sir Cumference and the Dragon of Pi
- Happy Pi Day to You! All About Measuring Circles (The Cat in the Hat's Learning Library)

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---

*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-23*