31 results for “shor”
Moving objects shorten along motion.
Shortest distance between two points on the Earth for long-range navigation.
Liquidity measure of short-term solvency.
Short-term financial health of a business.
A liquidity measure of whether a firm can cover its short-term obligations with short-term assets.
The short-term capital available to run day-to-day operations.
Shortest distance between two points on the globe.
Time complexity for Shor's algorithm to factor an integer N on a quantum computer.
Instantly multiply any two-digit number by 11 by splitting and adding the digits.
x% of y = y% of x. When one direction is hard, flip it! This works because (x/100)×y = (y/100)×x.
Multiply by 10 and divide by 2 (or vice versa) for instant results.
Multiply by 10 and subtract the original number — much faster than multiplying by 9 directly.
Since 25 = 100 ÷ 4, multiply by 100 and divide by 4 for instant results.
Multiply by 10, then add half of that — because 15 = 10 + 5 and 5 is half of 10.
a² − b² = (a + b)(a − b). Turns a subtraction of squares into an easy product.
Instantly multiply two numbers that share the same tens digit and whose units digits add up to 10 (e.g. 43 × 47, 62 × 68).
Square any number ending in 9 by leaning on the next round ten, which is much easier to square.
Any two-digit number times 101 is simply the number written twice — no working needed.
Dividing by 5 is awkward; doubling then moving the decimal one place is far faster.
Multiplying by 50 is the same as multiplying by 100 and halving — both easy steps.
Multiply by 12 by using the easy ×10 and then adding twice the number — the same idea extends to 13 and 14.
Extend the ×11 trick to three-digit numbers by adding each neighbouring pair of digits.
Multiply any two numbers from 11 to 19 in your head with a quick three-step pattern.
For any whole number, the product of the number before it, itself and the one after, plus the number, equals its cube.
Since 125 = 1000 ÷ 8, multiplying by 125 is just adding three zeros and dividing by 8.
Since 75 = 3 × 25, multiply by 3 and then by 25 (which is ×100 ÷ 4).
Multiplying by 1.5 is simply adding half of the number to itself — handy for recipes and time-and-a-half pay.
The average of any evenly spaced (arithmetic) sequence is simply (first + last) ÷ 2. No need to add all terms.
Convert fractions to percentages by using known benchmarks. For example, 1/8 = 12.5%, so 7/8 = 100% − 12.5% = 87.5%.
Use log properties to compute logs mentally: log(5) = log(10/2) = 1 − log(2). Memorize log(2) ≈ 0.301 and log(3) ≈ 0.477 to derive everything else.
Multiply any number by 6 by first multiplying by 3 (easy), then doubling the result. Two simple steps instead of one hard one.