
The Burj Khalifa in Dubai, United Arab Emirates, is the tallest building in the world since 2009. Its total height is 829.8 meters or 2,722 feet. Its weight is also impressive at 990 million pounds.
Completed in 2009 (construction began in 2004), the cost to build the Burj Khalifa is 1.5 billion USD. If a penny weighs 0.088 ounce, what is the weight ratio of the Burj Khalifa to all the pennies it cost to build it? (This problem is inspired by Amplify Education's 8th grade math curriculum.) 
On July 9, 2017, Josef Zellner and his friends in Pilsting, Germany, cooked up the largest burger on record, weighing in at 1,164 kg (2,566 lb).
McDonald's Big Mac weighs 240 grams (8.5 oz) and costs $3.99 in 2021. If the unit cost of the largest burger made is the same as the Big Mac's, how much would it cost? 
The Big Rocking Horse  located on the side of the road in Gumeracha, Australia  opened to the public in 1981. It stands 60 feet (18.3 m) tall.
A toy rocking horse, like the one pictured, made by labebe™, stands 26.5 inches. If a child with height of 40 inches (about 100 cm) can ride this toy, then proportionately, how tall could a "person" be riding on the Big Rocking Horse? 
The blue whale is an endangered species, its population is between 10,000 and 25,000. It is the largest animal on the planet, weighing as much as 200 tons. It needs to eat 4 tons of krill each day.
One species of krill, the Antarctic krill, is one of the most abundant animals, estimated to be around 400 trillion individuals. Its lifespan can be up to six years. If one krill weighs 2 grams (0.071 oz), how many krill would make up 4 tons? 
Chateau Grand Traverse shares these facts on its website:

Diamonds are valued according to their cut, color, carat and clarity. It's expensive because the average yield in most diamond mines is 1 part diamond to 1 million parts host rock. Diamond is the hardest natural substance that can only be scratched by another diamond. One carat costs anywhere between $2,500 and $16,000.
In 2007, the HarvardSmithsonian Center for Astrophysics announced the discovery of a 10 billiontrilliontrillion carat diamond in the sky called Lucy. The star is located fifty light years from Earth. Write "10 billiontrilliontrillion" in scientific notation. 
The Challenger Deep in the Mariana Trench is the deepest known point in Earth's oceans. Its depth is at 10,994 meters (36,070 feet) below sea level.
Mount Everest is Earth's highest mountain above sea level with an elevation of 8,848 meters (29,029 feet). It's located in the Mahalangur Himal subrange of the Himalayas. Say an adult human stands 6 feet tall. How many adults would it take to stack from the Challenger Deep to the top of Mount Everest? 
The Dead Sea is a landlocked salt lake between Israel and Jordan. It is at 418 m below sea level, therefore its shores mark Earth's lowest point not under water. Due to the lake's high salt content, you can float in it. The salt concentration of the Dead Sea fluctuates around 32%.
An average bathtub can hold 300 kg of water. The volume of the Dead Sea is 114 km^3 (27 cu mi). How much salt is needed to turn a bathtub into a mini Dead Sea? How many tons of salt are in the Dead Sea? 
In his book "Outliers," bestselling author Malcolm Gladwell popularized that it takes 10,000 hours of practice to be great at something.
Herbert Simon and William Chase wrote a paper in American Scientist that to reach the grandmaster level in the game of chess, one might need to spend as many as 50,000 hours staring at chess positions. Say, you're 5 years old and wanted to put in the 50,000 hours to become a grandmaster at chess. But you can only spend 4 hours each day doing so. How old will you be by the time you've reached your goal? 
Octopuses live in the ocean and are famous for having eight arms. Octopuses lay 56,000 eggs at a time.
An ostrich can lay 10 eggs at a time, each egg weighing as much as 1.5 kg. Let's say that each octopus egg weighs as much as one grain of rice, which is 0.029 g. What is the weight ratio of ostrich egg to octopus egg? 