Free N-Grams Calculator - Takes a phrase and displays chracter unigrams, character bigrams, character trigrams, and character n-grams as well as word unigrams, word bigrams, word trigrams, and word n-grams. (ngrams)
Also performs frequency analysis (number of instances of each letter)

Features:  Calculator | Watch the Video

Tags:

• bigram
• character
• n-gram
• trigram
• unigram
• word

Free Natural Logarithm Table Calculator - Generates a natural logarithm table for the first (n) numbers rounded to (r) digits

Features:  Calculator | Practice Problem Generator | Watch the Video

Examples (2):
natural log table up to 10
natural log table for 5

Tags:

• estimate
• logarithm
• natural logarithm table
• round
• table

Free Natural Numbers Calculator - Shows a set amount of natural numbers and cumulative sum

Features:  Calculator | Practice Problem Generator

Examples (1):
250 natural numbers

Tags:

• formula
• integer
• natural numbers
• number
• property
• sum

Free Negative Binomial Distribution Calculator - Calculates the probability of the k^th success on the x^th try for a negative binomial distribution also known as the Pascal distribution.? ? It calculates the probability of exactly k successes, no more than k successes, and greater than k successes as well as the mean, variance, and standard deviation.

Features:  Calculator | Quiz Generator | Practice Problem Generator | Watch the Video

Tags:

• binomial
• distribution
• event
• mean
• negative binomial distribution
• probability
• standard deviation
• variance

Free Net Present Value (NPV) - Internal Rate of Return (IRR) - Profitability Index Calculator - Given a series of cash flows C_t at times t and a discount rate of (i), the calculator will determine the Net Present Value (NPV) at time 0, also known as the discounted cash flow model.
Profitability Index
Also determines an Internal Rate of Return (IRR) based on a series of cash flows. NPV Calculator

Features:  Calculator | Quiz Generator | Practice Problem Generator | Watch the Video

Tags:

• cash flow
• discount rate
• interest
• net present value (npv) - internal rate of return (irr) - profitability index
• present value
• return

Free Newton Method Calculator - Calculates the square root of a positive integer using the Newton Method

Features:  Calculator | Quiz Generator | Practice Problem Generator

Examples (1):
Newton method sqrt(50)

Tags:

• algorithm
• newtons method
• square root

Free Nominal Yield Calculator - Given an effective annual rate of interest based on a compounding period, this determines the nominal yield.

Features:  Calculator | Practice Problem Generator

Tags:

• compound interest
• effective interest rate
• nominal interest rate
• nominal yield
• yield

Free Nonagon Calculator - Calculates the side, perimeter, and area of a nonagon

Features:  Calculator | Practice Problem Generator

Examples (60):
Nonagon side = 1
Nonagon area = 1
Nonagon perimeter = 1
Nonagon side = 2
Nonagon area = 2
Nonagon perimeter = 2
Nonagon side = 3
Nonagon area = 3
Nonagon perimeter = 3
Nonagon side = 4
Nonagon area = 4
Nonagon perimeter = 4
Nonagon side = 5
Nonagon area = 5
Nonagon perimeter = 5
Nonagon side = 6
Nonagon area = 6
Nonagon perimeter = 6
Nonagon side = 7
Nonagon area = 7
Nonagon perimeter = 7
Nonagon side = 8
Nonagon area = 8
Nonagon perimeter = 8
Nonagon side = 9
Nonagon area = 9
Nonagon perimeter = 9
Nonagon side = 10
Nonagon area = 10
Nonagon perimeter = 10
Nonagon side = 11
Nonagon area = 11
Nonagon perimeter = 11
Nonagon side = 12
Nonagon area = 12
Nonagon perimeter = 12
Nonagon side = 13
Nonagon area = 13
Nonagon perimeter = 13
Nonagon side = 14
Nonagon area = 14
Nonagon perimeter = 14
Nonagon side = 15
Nonagon area = 15
Nonagon perimeter = 15
Nonagon side = 16
Nonagon area = 16
Nonagon perimeter = 16
Nonagon side = 17
Nonagon area = 17
Nonagon perimeter = 17
Nonagon side = 18
Nonagon area = 18
Nonagon perimeter = 18
Nonagon side = 19
Nonagon area = 19
Nonagon perimeter = 19
Nonagon side = 20
Nonagon area = 20
Nonagon perimeter = 20

Tags:

• area
• nonagon
• perimeter
• polygon
• side

Free Nonagonal Number Calculator - This calculator determines the nth nonagonal number

Features:  Calculator | Practice Problem Generator | Watch the Video

Examples (2):
30th Nonagonal number
45th Nonagonal number

Tags:

• figurate number
• formula
• nonagon
• nonagonal number
• number

Free Normal Distribution Calculator - Calculates the probability that a random variable is less than or greater than a value or between 2 values using the Normal Distribution z-score (z value) method (Central Limit Theorem).
Also calculates the Range of values for the 68-95-99.7 rule, or three-sigma rule, or empirical rule. Calculates z score probability

Features:  Calculator | Quiz Generator | Practice Problem Generator

Examples (3):
P(Z>1.5)
P(Z<2.15)
The amount of Jens monthly phone bill is normally distributed with a mean of $73 and a standard deviation of $12. What percentage of her phone bills are between $37 and $109?

Tags:

• distribution
• empirical rule
• event
• mean
• normal distribution
• probability
• standard deviation
• variance
• z score

Free Number Bonds Calculator - Adds or subtracts 2 numbers and using grouping by 10 or 100. Also called number bonds or addition facts. Multiplies two numbers using tape diagrams.

Features:  Calculator | Practice Problem Generator

Examples (3):
12+15
11+7
9*7

Tags:

• addition
• diagrams
• grouping
• number bonds
• number
• subtraction

Free Number Info Calculator - Calculates number info for a positive integer

Features:  Calculator | Quiz Generator | Practice Problem Generator

Examples (2):
25
38

Tags:

• integer
• number
• property
• tally

Free Number Line Calculator - Counts from a point going left and right on a number line

Features:  Calculator | Quiz Generator | Practice Problem Generator

Tags:

• addition
• number line
• number
• sea level
• subtraction
• temperature

Free Number Line Midpoint Calculator - Calculates a midpoint between 2 points on a number line or finds the second endpoint if one endpoint and midpoint are given.

Features:  Calculator | Quiz Generator | Practice Problem Generator | Watch the Video

Examples (3):
midpoint 2,5
midpoint of 2 and 6
mpt 3,5

Tags:

• absolute value
• average
• distance
• midpoint
• number line midpoint
• number line
• number
• point

Free Number Property Calculator - This calculator determines if an integer you entered has any of the following properties:
* Even Numbers or Odd Numbers (Parity Function or even-odd numbers)
* Evil Numbers or Odious Numbers
* Perfect Numbers, Abundant Numbers, or Deficient Numbers
* Triangular Numbers
* Prime Numbers or Composite Numbers
* Automorphic (Curious)
* Undulating Numbers
* Square Numbers
* Cube Numbers
* Palindrome Numbers
* Repunit Numbers
* Apocalyptic Power
* Pentagonal
* Tetrahedral (Pyramidal)
* Narcissistic (Plus Perfect)
* Catalan
* Repunit

Features:  Calculator | Practice Problem Generator | Watch the Video

Examples (6):
30 as a unique number
45 as a composite number
numerical properties of 100
properties of 35
tell me about 72
A(4)

Tags:

• divisor
• even
• narcissistic numbers
• number property
• number
• odd
• palindrome
• pentagon
• pentagonal number
• perfect number
• property

Free Numbers Word Problems Calculator - Solves various basic math and algebra word problems with numbers

Features:  Calculator | Practice Problem Generator

Tags:

• consecutive integers
• integer
• number
• word problem