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  2. Situs inversus - Wikipedia

    en.wikipedia.org/wiki/Situs_inversus

    If the heart is swapped to the right side of the thorax, it is known as "situs inversus with dextrocardia" or "situs inversus totalis". If the heart remains on the normal left side of the thorax, a much rarer condition (1 in 2,000,000 of the general population), it is known as "situs inversus with levocardia" or "situs inversus incompletus".

  3. Birthday problem - Wikipedia

    en.wikipedia.org/wiki/Birthday_problem

    The event that all 23 people have different birthdays is the same as the event that person 2 does not have the same birthday as person 1, and that person 3 does not have the same birthday as either person 1 or person 2, and so on, and finally that person 23 does not have the same birthday as any of persons 1 through 22. Let these events be ...

  4. Mental calculation - Wikipedia

    en.wikipedia.org/wiki/Mental_calculation

    3 − 1 = 2, say "Two thousand". One is performing 3 - 1 rather than 4 - 1 because the column to the right is going to borrow from the thousands place. Hundreds: 0 − 8 = negative numbers not allowed here. One is going to increase this place by using the number one borrowed from the column to the left.

  5. Blood quantum laws - Wikipedia

    en.wikipedia.org/wiki/Blood_quantum_laws

    A person's blood quantum (BQ) is defined as the fraction of their ancestors, out of their total ancestors, who are documented as full-blood Native Americans. For instance, a person who has one parent who is a full-blood Native American and one who has no Native ancestry has a BQ of 1/2.

  6. Percentile - Wikipedia

    en.wikipedia.org/wiki/Percentile

    The dark blue zone represents observations within one standard deviation (σ) to either side of the mean (μ), which accounts for about 68.3% of the population. Two standard deviations from the mean (dark and medium blue) account for about 95.4%, and three standard deviations (dark, medium, and light blue) for about 99.7%.

  7. Here's the Average Social Security Benefit at Ages 62, 67, and 70

    www.aol.com/heres-average-social-security...

    On the other hand, while only a small percentage of retired workers waited until age 70 to begin receiving their Social Security benefit, this would have been optimal for an astounding 57% of the ...

  8. Atrial septal defect - Wikipedia

    en.wikipedia.org/wiki/Atrial_septal_defect

    Atrial septal defect (ASD) is a congenital heart defect in which blood flows between the atria (upper chambers) of the heart.Some flow is a normal condition both pre-birth and immediately post-birth via the foramen ovale; however, when this does not naturally close after birth it is referred to as a patent (open) foramen ovale (PFO).

  9. 20 Ways You’re Throwing Away Money and How To Fix It - AOL

    www.aol.com/finance/20-ways-throwing-away-money...

    You probably don't realize all the ways you're wasting money and leaving free money on the table -- and these little missteps can add up to big dollar losses. Fortunately, once you're aware of ...