How many giant pandas were there?(SDG15: Life on Land)

Factful math: Grade 4th-6th

Math skills: Percentage

Related issues: Biodiversity / SDG15: Life on Land

During 1975 and 2005, Giant Pandas numbers had fallen from 2500 to 1600 largely due to loss of habitat and poachers. However after decades of conservation efforts, Giant Pandas are on the road to recovery. Giant Pandas numbers had increased by 16% during 2005 and 2015. About how many Giant Pandas were there in 2015?

A. 2,900

B. 2,100

C. 1,900

photo credit: San Diego Zoo


1600 x 1.16 = 1856 = about 1900

Source: WWF History of the Giant Panda

how many times more Tesla Model Y were sold than Volkswagen ID.4?

Factful math: Grade 3rd-5th

Math skills: Bar graphs

Related Environmental issues: EVs

More than 172 thousand units of Tesla Model Y were sold in the U.S. in 2021.

About how many times more Tesla Model Ys were sold than the 5th bestselling EVs in 2021?

  1. 5
  2. 10
  3. 20


170 / 20 = 8.5 = about 10

Source: Car and driver, 2022. 12 Bestselling Electric Vehicles of 2021. 




The objective of Factful Environmental Math Problems is to cultivate our young people’s skills to analyze and evaluate fact-based data for understanding our world, while improving their math skills and critical thinking skills.

With the rise of the Internet and new technology, building skills to analyze and evaluate fact-based data becomes increasingly important for our young people to prepare for this rapidly changing world. These skills minimize their chances of being brainwashed by false information and making uninformed decisions and ultimately help develop their critical thinking skills. (Read more)

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Published: March 26, 2020

Price: $6.25