Dad baffled by challenging maths problem in nine-year-old son's homework
A nine-year-old's maths homework has sent social media users into a spiral as they try to figure out the answer - with some ...
This is what the pyramid and the eye on the one-dollar bill mean: Symbolism explained
The mysterious symbol has been linked to illuminati conspiracy theories, but the history of the Great Seal is actually based ...
BBC3y
Pyramids of number and biomass
A food chain with its pyramid of number. Energy is lost to the surroundings from one level to the next, so there are usually fewer organisms at each level in this food chain. A lot of clover is ...
WNCT9d
Why 2025 is a rare ‘perfect square year’
“If you add up all the numbers from 1 to 9, you get 45. 45 is sometimes called a triangular number, or a pyramid number.” The ...
CBS4y
Population pyramid
The population pyramid displays the population composition in the Netherlands per year. For each age, the number of men is shown on the left and the number of women on the right. The pyramid contains ...