# Math

posted by .

The mathematician Augustus DeMorgan lived his entire life during the 1800s. In the last year of his life he announced "Once I was x years old in the year x^2". In which year was he born?

• Math -

the only perfect square between 1800 and 1900 is 1849 = 43^2

so, he was 43 in 1849, and born in 1806

• Math -

40^2 = 1600

50^2 = 2500

So his age has to be between 40 and 50

What number between 40 and 50 when squared is a number between 1800 and 1900?

43^2 = 1849

if he was 43 in the year 1849, then he was 0 (the age he was born) in ???

## Similar Questions

1. ### SS

Which of the following is elegible to run for the presidency: a 45 year old banker who was born and raised in Wyoming or a 30year old state legialator who was born in Virginia, lived abroas for 10 years then returned to Virginia?
2. ### Math

The average life expectancy for American men born in 1900 was 55 years. Life expectancy has increased by about .2 year for each birth year after 1900. If this trend continues, for which birth year will the average life expectancy be …
3. ### math

pierre was born in the twentieth century and will be x years old in the year x squared. In what year was pierre born
4. ### Finance

Delta Software is considering a new project whose data are shown below. The equipment that would be used has a 3-year tax life, after which it will be worthless, and it will be depreciated by the straight line method over 3 years. …
5. ### government

Which of the following is eligible to run for the presidency: a 45-year old banker who was born and raised in Wyoming or a 30-year-old State legislator who was born in Virginia, lived abroad for 10 years, then returned to Virginia?
6. ### accounting

A company purchased a machine on January 1 of the current year for \$750,000. Calculate the annual depreciation expense for each year of the machine's life (estimated at 5 years or 20,000 hours, with a salvage value of \$75,000). During …
7. ### math

a life insurance agent is to be paid a commission according to the following scheme : 1000\$ in year 1, half the year 1 amount in year 2, half the year 2 amount in year 3, etc. what is the total of the all amounts received by the agent …
8. ### Urgent math

A couple needs a mortgage of \$300,000. Their mortgage broker presents them with two options: a 30-year mortgage at 8 1/2% interest or a 15-year mortgage at 7 3/4% interest. (Round your answers to the nearest cent.) (a) Find the monthly …
9. ### Math

If you were 35 years old in the year 1225. It would be a very special time mathematically because 35^2 = 1225. That is the square of your age at the moment is equal to the year. Augustus de Morgan, a famous mathematician was one of …
10. ### Math

The U.S life expectancy of a baby born in 1960 was 69.8 years. For a birth year of 2010, the U.S life expectant was 78.5 years. Let Y be the US life expectancy for a baby born in the year x, where x=0 represents the year 1960. What …

More Similar Questions