Search results
Results from the WOW.Com Content Network
Since 9 = 10 − 1, to multiply a number by nine, multiply it by 10 and then subtract the original number from the result. For example, 9 × 27 = 270 − 27 = 243. This method can be adjusted to multiply by eight instead of nine, by doubling the number being subtracted; 8 × 27 = 270 − (2×27) = 270 − 54 = 216.
4.9 × 10 −324 is approximately equal to the smallest non-zero value that can be represented by a double-precision IEEE floating-point value. 1.5 × 10 −157 is approximately equal to the probability that in a randomly selected group of 365 people, all of them will have different birthdays. [3]
In general, if an increase of x percent is followed by a decrease of x percent, and the initial amount was p, the final amount is p (1 + 0.01 x)(1 − 0.01 x) = p (1 − (0.01 x) 2); hence the net change is an overall decrease by x percent of x percent (the square of the original percent change when expressed as a decimal number).
Subtract the right-most digit from 10. Subtract the remaining digits from 9. Add half of the neighbor, plus 5 if the digit is odd. For the leading 0, subtract 1 from half of the neighbor. Example: 346 × 4 = 1384 Working from right to left: (10 − 6) + Half of 0 (0) = 4. Write 4. (9 − 4) + Half of 6 (3) = 8. Write 8.
Order of magnitude is a concept used to discuss the scale of numbers in relation to one another. Two numbers are "within an order of magnitude" of each other if their ratio is between 1/10 and 10. In other words, the two numbers are within about a factor of 10 of each other. [1] For example, 1 and 1.02 are within an order of magnitude.
33,554,432 = Leyland number using 8 & 8 (8 8 + 8 8); 32 5 = 2 25, number of directed graphs on 5 labeled nodes [25] 33,555,057 = Leyland number using 2 & 25 (2 25 + 25 2 ) 33,588,234 = number of 32-bead necklaces (turning over is allowed) where complements are equivalent [ 12 ]
Even with modest inflation rates of 2% to 3%, your $40,000 annual withdrawal from your $1 million nest egg won't stretch as far in 10 or 15 years as it did in your first year of retirement.
Trillion is a number with two distinct definitions: 1,000,000,000,000, i.e. one million million, or 10 12 (ten to the twelfth power), as defined on the short scale. This is now the meaning in both American and British English. 1,000,000,000,000,000,000, i.e. 10 18 (ten to the eighteenth power), as defined on the long scale. This is one million ...