What number comes next?
Look at the series (2, 3, 6, 21, 231), determine the pattern, and find the value of the next number!Correct answers: 56
The first user who solved this task is Slobodan Strelac.
#brainteasers #math
Telephone exchangeIn 1922, the first automated telephones, the Pennsylvania exchange in N.Y. City, become operational. |