🔐

|

Enter your mobile number

Mobile Number

+91

New here? Create account

Back to login

✉️

Verify OTP

Enter the 4-digit code sent to your device

Didn't receive code?

Back

🚀

Get Started

Create your account in seconds

Full Name*

Username*

Mobile Number*

+91

Date of Birth*

Gender*

Male

Female

Other

Email Address *

Choose Avatar

Already have an account? Sign in

Back to details

🔢

Almost There

Verify your phone number to complete

Didn't receive code?

My Profile

—

—

Personal Info

Full Name —

Username —

Mobile —

Email —

Gender —

Date of Birth —

Operation successful!

Roobai | Deals & Offers | Online Shopping | Best Deals

Loading…

The Calculus of Friendship: What a Teacher and a Student Learned about Life while Corresponding about Math

The Calculus of Friendship: What a Teacher and a Student Learned about Life while Corresponding about Math

OFFER PRICE: ₹20

MRP: ₹1584 99%

MRP: ₹1584 OFFER: ₹20 99%

You successfully saved ₹1,564!

Copied successfully!

Similar Products

	VauriiC De Tan Moringa Exfoliating Body Scrub 200 gms for Glowing, Soft, Smooth Skin \| Remove Tan, Blackhead, Dirt & Dead Skin with Coffee, Walnut, Vitamin C, Probiotics & Niacinamide \| Paraben & Sulphate Free \|100% Vegan, Bathing Scrub \| Men & Women \| All Skin Type VauriiC De Tan Moringa Exfoliating Body Scrub 200 gms for Glowing, Soft, Smooth Skin \| Remove Tan, Blackhead, Dirt & Dead Skin with Coffee, Walnut, Vitamin C, Probiotics & Niacinamide \| Paraben & Sulphate Free \|100% Vegan, Bathing Scrub \| Men & Women \| All Skin Type	~~₹649~~ ₹109 83%	Buy Now
	Crackles Pretend Play Solid Colour Tea Party Kitchen Play Set Toy with Teapot, Cups Pretend Play Cooking Set, Toy Pots N Pans, Cookware, Utensils Crackles Pretend Play Solid Colour Tea Party Kitchen Play Set Toy with Teapot, Cups Pretend Play Cooking Set, Toy Pots N Pans, Cookware, Utensils	~~₹600~~ ₹104 83%	Buy Now
	Sulfar Self Adhesive Corner Shelf for Bathroom Adhesive Shelf for Kitchen with Magic Sticker Bathroom Organizer Without Drill (Black) Pack of 2 Sulfar Self Adhesive Corner Shelf for Bathroom Adhesive Shelf for Kitchen with Magic Sticker Bathroom Organizer Without Drill (Black) Pack of 2	~~₹1,799~~ ₹255 86%	Buy Now
	Aristocrat Spark 62Cm Polyester Medium Blue Duffle Bag, 30 Cm Aristocrat Spark 62Cm Polyester Medium Blue Duffle Bag, 30 Cm	~~₹3,200~~ ₹531 83%	Buy Now
	Floraware Plastic Air Tight BPA Free Stackable Round Push Multipurpose Containers For Kitchen Organizer 900ml for Rice Dal Flour Snacks Cereals Pack of 6 (Red) Floraware Plastic Air Tight BPA Free Stackable Round Push Multipurpose Containers For Kitchen Organizer 900ml for Rice Dal Flour Snacks Cereals Pack of 6 (Red)	~~₹2,964~~ ₹459 85%	Buy Now
	Razer Hanbo Chroma RGB All-In-One Liquid Cooler: Ultimate AIO Design - Quiet Fans - Silent Cooling - PWM Fan Controller Support - ARGB Pump Cap - 360MM-RC21-01770200-R3M1 Razer Hanbo Chroma RGB All-In-One Liquid Cooler: Ultimate AIO Design - Quiet Fans - Silent Cooling - PWM Fan Controller Support - ARGB Pump Cap - 360MM-RC21-01770200-R3M1	~~₹74,799~~ ₹10563 86%	Buy Now
	Fire-Boltt Phoenix Aura Women Smart Watch with 1.26 Diamond-Cut HD Display, Rotating Crown, Wireless Charging, Bluetooth Calling, Voice Assistant, 120+ Sports Modes - Silk Champagne Fire-Boltt Phoenix Aura Women Smart Watch with 1.26 Diamond-Cut HD Display, Rotating Crown, Wireless Charging, Bluetooth Calling, Voice Assistant, 120+ Sports Modes - Silk Champagne	~~₹20,999~~ ₹1899 91%	Buy Now
	PAffy Premium Light Weight Aluminium Heavy Duty Folding Step Ladder - Maple 5 Steps with 7 Years Warranty * Made in India PAffy Premium Light Weight Aluminium Heavy Duty Folding Step Ladder - Maple 5 Steps with 7 Years Warranty * Made in India	~~₹12,999~~ ₹808 94%	Buy Now
	amazon basics Metal Condenser Microphone with 6m Cable \| Compatible with Smartphones, Cameras, PCs, and Laptops \| Built-in Noise Reduction (Black) amazon basics Metal Condenser Microphone with 6m Cable \| Compatible with Smartphones, Cameras, PCs, and Laptops \| Built-in Noise Reduction (Black)	~~₹1,999~~ ₹326 84%	Buy Now
	pTron Zenbuds Evo in-Ear TWS Earbuds, Built-in HD mics with TruTalk AI-ENC for Stereo Calls, 45ms Movie/Music Modes, 32Hrs Playtime, Bluetooth v5.3, IPX5 & Type-C Fast Charging (Jet Black) pTron Zenbuds Evo in-Ear TWS Earbuds, Built-in HD mics with TruTalk AI-ENC for Stereo Calls, 45ms Movie/Music Modes, 32Hrs Playtime, Bluetooth v5.3, IPX5 & Type-C Fast Charging (Jet Black)	~~₹3,799~~ ₹699 82%	Buy Now

How to buy this product?

The Calculus of Friendship: What a Teacher and a Student Learned about Life while Corresponding about Math is available on Amazon — Click here to check the latest price and buy now.

Description

This book is a delightful and enlightening read. It is a series of letters between a teacher and a student in which they discuss math, life, and philosophy. The teacher is the math instructor at a small high school and the student is an honors student who has been struggling with the subject. The student asks the teacher for help, and the teacher responds with letters that delve into the complex topics of friendship, love, and how to think about life. The Calculus of Friendship is a memoir written by Andrew Hartzler and Jerry Weinstein. The two became friends in 2009 when Hartzler, a math teacher, and Weinstein, a student, started corresponding about math. Their emails evolved into a "vast trove of ideas and emotions" that was equal parts "intensely personal and deeply philosophical." Hartzler and Weinstein chronicle their lives and the lessons they learned from each other.

Disclaimer

Sometimes you may see variation in product price due to “different seller” or “offer ended”.
Product prices and availability are accurate as of the date/time indicated above and are subject to change. Any price and availability information displayed on the Merchant’s Site at the time of purchase will apply to the purchase of this product..
roobai.com has no control over and makes no warranty or guarantee regarding the quality, usability, safety, morality or legality of any aspect of the items listed, the truth or accuracy of the listings or the ability of sellers to sell items or honor their coupon or promotion..

Disclosure

Coupons and Deals are valid at the time of posting and it may expire anytime.

We may get a commission if you purchase this Product from the Seller. But It does not add any additional cost to the buyer while buying products.

roobai.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for website owners to earn fees by linking to Amazon.in.

Recent Products

View all

VauriiC De Tan Moringa Exfoliating Body Scrub 200 gms for Glowing, Sof

VauriiC De Tan Moringa Exfoliating Body Scrub 200 gms for Glowing, Sof

₹109

₹649

83%

Crackles Pretend Play Solid Colour Tea Party Kitchen Play Set Toy with

Crackles Pretend Play Solid Colour Tea Party Kitchen Play Set Toy with

₹104

₹600

83%

Sulfar Self Adhesive Corner Shelf for Bathroom Adhesive Shelf for Kitc

Sulfar Self Adhesive Corner Shelf for Bathroom Adhesive Shelf for Kitc

₹255

₹1799

86%

Aristocrat Spark 62Cm Polyester Medium Blue Duffle Bag, 30 Cm

Aristocrat Spark 62Cm Polyester Medium Blue Duffle Bag, 30 Cm

₹531

₹3200

83%

Floraware Plastic Air Tight BPA Free Stackable Round Push Multipurpose

Floraware Plastic Air Tight BPA Free Stackable Round Push Multipurpose

₹459

₹2964

85%

Razer Hanbo Chroma RGB All-In-One Liquid Cooler: Ultimate AIO Design -

Razer Hanbo Chroma RGB All-In-One Liquid Cooler: Ultimate AIO Design -

₹10563

₹74799

86%

Fire-Boltt Phoenix Aura Women Smart Watch with 1.26 Diamond-Cut HD Dis

Fire-Boltt Phoenix Aura Women Smart Watch with 1.26 Diamond-Cut HD Dis

₹1899

₹20999

91%

PAffy Premium Light Weight Aluminium Heavy Duty Folding Step Ladder -

PAffy Premium Light Weight Aluminium Heavy Duty Folding Step Ladder -

₹808

₹12999

94%

amazon basics Metal Condenser Microphone with 6m Cable | Compatible wi

amazon basics Metal Condenser Microphone with 6m Cable | Compatible wi

₹326

₹1999

84%

pTron Zenbuds Evo in-Ear TWS Earbuds, Built-in HD mics with TruTalk AI

pTron Zenbuds Evo in-Ear TWS Earbuds, Built-in HD mics with TruTalk AI

₹699

₹3799

82%

Homesake Hanging Light Diamond Cluster-Modern Ceiling Pendant Light fo

Homesake Hanging Light Diamond Cluster-Modern Ceiling Pendant Light fo

₹709

₹3700

81%

Aardwolf Quickfit Step Aluminium Ladder, Silver, Non-Slip Steps with P

Aardwolf Quickfit Step Aluminium Ladder, Silver, Non-Slip Steps with P

₹2588

₹25000

90%

Desidiya Modern Crystal Chandelier 150watt Decorative Pendant Crystal

Apply 2% Coupon

Desidiya Modern Crystal Chandelier 150watt Decorative Pendant Crystal

₹979

₹7999

88%

N.A Supplier Metal Black and Orange Color Fork for Home Gardening Tool

N.A Supplier Metal Black and Orange Color Fork for Home Gardening Tool

₹95

₹999

90%

HUSTLR Polarized & 100% UV Protected Stylish Sunglasses | Flame Grey F

HUSTLR Polarized & 100% UV Protected Stylish Sunglasses | Flame Grey F

₹650

₹3500

81%

VIKSTERX M190 Wired Gaming Mouse with high Precision sensors, Multi Co

VIKSTERX M190 Wired Gaming Mouse with high Precision sensors, Multi Co

₹199

₹999

80%

Anchor By Panasonic 66801WDB Roma Urban Modular Polycarbonate 1M Curve

Anchor By Panasonic 66801WDB Roma Urban Modular Polycarbonate 1M Curve

₹274

₹1435

81%

Corslet Pack of 13 Artist Pencil for Sketching Pencils Drawing Pencil

Corslet Pack of 13 Artist Pencil for Sketching Pencils Drawing Pencil

₹198

₹1250

84%

BLACK+DECKER Black Grain Leather Safety Shoes for Men | Antislip, Oil

BLACK+DECKER Black Grain Leather Safety Shoes for Men | Antislip, Oil

₹1017

₹5399

81%

The Old Natural Lavish Musk Car Freshener Diffuser Car ...

The Old Natural Lavish Musk Car Freshener Diffuser Car ...

₹136

₹599

77%

/* If JS disabled, hide loader overlay because it won't be removed */ #page-loader { display: none !important; } body { overflow: auto !important; } This site works best with JavaScript enabled.