FREE SHIPPING on 2+ tees. Use FSHIP2 in checkout! Details
Chummy Tees

Funny Fibonacci Easy as 1123 T Shirt / Tank Top

T-shirts for men, women, boys, girls, kids, & the baby



(View Size Chart & Material Info)



Mens T Shirt
Tank Top
Womens T Shirt
Womens V Neck Shirt
Womens Racerback Tank
Womens Muscle Tank
Youth Shirt
Toddler Shirt
Baby Bodysuit

SALE ENDS TODAY! Get 10% off your order w/code FUN28. Details


payment icons
Printed & shipped from California
10,000+ satisfied customer reviews

Funny Fibonacci Easy as 1123 Shirt

Designed & Sold By Chummy Tees®

The Funny Fibonacci Easy as 1123 T-Shirt is here to make math a little more fun. Give your wardrobe a mathematical makeover and show off your love for Fibonacci with this cool t-shirt. Perfect for scientists, mathematicians, professors, and science teachers, this tee is sure to let everyone know how much you appreciate the genius mathematics of Fibonacci. Whether you’re teaching in the classroom or out at the park, you’ll be sure to make an impression in this funny t-shirt. Not only will it help you express yourself with a healthy dose of fun and fashion, but it also presents an excellent opportunity for others to learn more about Fibonacci and his amazing accomplishments.



What is your return policy?

You can return your item(s) for a refund or exchange them within 30 days of delivery. For more information and instructions, read our return & refund policy.

When will my order arrive?

Most orders ship out within 3-4 business days from our warehouse in California, United States via USPS 1st class mail.

For more info about order shipping and our delivery estimates, you can read our Shipping Policy & Manufacturing Info page.

How much is shipping?

•For most orders, standard shipping is $5.95.
•Shipping with Expedited Manufacturing for most orders is $10.95

What payment options do you accept?

Credit Cards: Visa, Mastercard, American Express, Discover, JCB, Diners Club International

Accelerated Checkouts: Google Pay, Apple Pay, Shopify Pay, Amazon Pay

We do not accept cash, checks, money orders, or CODs for online purchases. We do not offer in-person purchases at this time.


Know someone who would like this Funny Fibonacci Easy as 1123 Shirt?

Size Chart: