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Maths on the Back of an Envelope: Clever ways to (roughly) calculate anything. An entertaining introduction to mental maths and problem solving Maths on the Back of an Envelope: Clever ways to (roughly) calculate anything. An entertaining introduction to mental maths and problem solving
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Felix
Felix is on page 118 of 160
— Oct 29, 2025 08:52PM Add a comment
Maths on the Back of an Envelope: Clever ways to (roughly) calculate anything








Tara Boyton
Tara Boyton is on page 181 of 208
— Jan 26, 2025 04:50AM Add a comment
Maths on the Back of an Envelope: Clever ways to (roughly) calculate anything. An entertaining introduction to mental maths and problem solving

Tara Boyton
Tara Boyton is on page 128 of 208
— Jan 22, 2025 04:00PM Add a comment
Maths on the Back of an Envelope: Clever ways to (roughly) calculate anything. An entertaining introduction to mental maths and problem solving

Tara Boyton
Tara Boyton is on page 114 of 208
— Jan 21, 2025 03:59PM Add a comment
Maths on the Back of an Envelope: Clever ways to (roughly) calculate anything. An entertaining introduction to mental maths and problem solving








Elaad Yair
Elaad Yair is on page 141 of 208
— Jan 01, 2025 09:21AM Add a comment
Maths on the Back of an Envelope: Clever ways to (roughly) calculate anything. An entertaining introduction to mental maths and problem solving

Elaad Yair
Elaad Yair is on page 141 of 208
— Jan 01, 2025 09:21AM Add a comment
Maths on the Back of an Envelope: Clever ways to (roughly) calculate anything. An entertaining introduction to mental maths and problem solving

Elaad Yair
Elaad Yair is on page 137 of 208
— Jan 01, 2025 01:22AM Add a comment
Maths on the Back of an Envelope: Clever ways to (roughly) calculate anything. An entertaining introduction to mental maths and problem solving

Elaad Yair
Elaad Yair is on page 108 of 208
— Dec 29, 2024 12:24PM Add a comment
Maths on the Back of an Envelope: Clever ways to (roughly) calculate anything. An entertaining introduction to mental maths and problem solving

Elaad Yair
Elaad Yair is on page 52 of 208
— Dec 25, 2024 09:29AM Add a comment
Maths on the Back of an Envelope: Clever ways to (roughly) calculate anything. An entertaining introduction to mental maths and problem solving

Elaad Yair
Elaad Yair is on page 38 of 208
— Dec 25, 2024 02:41AM Add a comment
Maths on the Back of an Envelope: Clever ways to (roughly) calculate anything. An entertaining introduction to mental maths and problem solving

Elaad Yair
Elaad Yair is on page 18 of 208
— Dec 15, 2024 01:28AM Add a comment
Maths on the Back of an Envelope: Clever ways to (roughly) calculate anything. An entertaining introduction to mental maths and problem solving

Elaad Yair
Elaad Yair is on page 11 of 208
— Dec 14, 2024 08:43AM Add a comment
Maths on the Back of an Envelope: Clever ways to (roughly) calculate anything. An entertaining introduction to mental maths and problem solving





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