## What is halfway between 1 and 10 on a logarithmic scale?

Values are not equally spaced on a logarithmic axis. The logarithm of 10 is 1.0, and the logarithm of 100 is 2.0, so the logarithm of the midpoint is 1.5.

## Do kids think logarithmically?

Our brains are wired to think logarithmically instead of linearly: Children, when asked what number is halfway between 1 and 9, intuitively think it’s 3. This attention to relative rather than absolute differences is an evolutionary adaptation.

## What does it mean to count logarithmically?

A logarithmic scale (or log scale) is a way of displaying numerical data over a very wide range of values in a compact way—typically the largest numbers in the data are hundreds or even thousands of times larger than the smallest numbers. Rather, the numbers 10 and 100, and 60 and 600 are equally spaced.

## Why do we need logarithm?

Logarithms are a convenient way to express large numbers. (The base-10 logarithm of a number is roughly the number of digits in that number, for example.) Slide rules work because adding and subtracting logarithms is equivalent to multiplication and division. (This benefit is slightly less important today.)

## How do you convert Antilog to log?

Multiply a common log by 2.303 to obtain the corresponding natural log. The antilogarithm (also called an antilog) is the inverse of the logarithm transform. Since the logarithm (base 10) of 1000 equals 3, the antilogarithm of 3 is 1000.

## How do you find the log and antilog on a calculator?

Find log and antilog by using simple calculator…

1. WRITE 2.7183.
2. TAP ‘ √ ‘ (i.e. Square Root) 12 times.
3. DEDUCT ‘ 1 ‘ (= 0.00024417206)
4. PRESS ‘ M+ ‘ KEY.
5. WRITE THE NO. OF WHICH ,YOU WANT TO FIND LOG. (E.G. LOG 5 THEN WRITE 5)
6. TAP ‘ √ ‘ (i.e. Square Root) 12 times.
7. DEDUCT ‘ 1 ‘
8. PRESS ‘ ÷ ‘

## How do you find the log?

Log base 2: an example

1. Decide on the number you want to find the logarithm of.
2. Decide on your base – in this case, 2.
3. Find the logarithm with base 10 of number 100.
4. Find the logarithm with base 10 of number 2.
5. Divide these values by one another: lg(100)/lg(2) = 2 / 0.30103 = 6.644 .

## Can you log both sides of an inequality?

When you take logs of both sides of an inequality, say x a < y, you get log(x a) < log(y). Now, dividing both sides by log(x) would only flip the inequality if log(x) is negative. This occurs when 0 < x < 1. So, if 0 < x < 1, then a > log(y)/log(x).

## Can a log have a base less than 1?

If the base is less than 1, the logarithmic function is decreasing. The graph gets close to the y-axis when x is small, but with positive y values instead of negative ones. This function has a domain of all real numbers and a range of positive real numbers.