## Enter Integer

Show numerical properties of

25

twenty five

Make blocks of 5

##### Tally Marks Definition:

1 tally mark = |

2 tally marks = ||

3 tally marks = |||

4 tally marks = ||||

5 tally marks = | | | |

5 = | | | |

10 = | | | |

15 = | | | |

20 = | | | |

25 = | | | |

##### Tallies for 25

| | | | | | | | | | | | | | | | | | | |

##### Ordinal for 25

Define an ordinal number

A position in a list

25th

##### Digit and Reduced Digit Sum for 25

Calculate the digit sum of 25

Calculate the reduced digit sum of 25

##### Add up 2 digits of 25:

Digit Sum → 2 + 5 = 7

Since our digit sum ≤ 9:
we have our reduced digit sum

Digit Sum → 2 + 5 = 7

##### Digit Product for 25:

Calculate the digit product of 25

Digit Product = Value when you multiply
all the digits of a number together.

We multiply the 2 digits of 25 together

Digit product of 25 = 2 * 5

Digit product of 25 = 10

##### Opposite of 25

Opposite of 25 = -(25)

Opposite of = -25

##### 25!

25! = 25 x 24 x 23 x 22 x 21 x 20 x 19 x 18 x 17 x 16 x 15 x 14 x 13 x 12 x 11 x 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1

25! = 1.5511210043331E+25

##### Place Value for 25

Place value describes each digit

##### Whole Number Position 2: 25

2 is our tens digit

This means we have 2 sets of tens

##### Whole Number Position 1: 25

5 is our ones digit

This means we have 5 sets of ones

2 is our tens digit
5 is our ones digit

##### Natural Logarithm of 25

When ey = x and e = 2.718281828459
We have Ln(x) = loge(x) = y

##### Evaluate x = 25

Ln(25) = loge(25) = 3.2188758248682

Is 25 divisible by:

2,3,4,5,6,7,8,9,10,11

##### Divisibililty Check for 2

Last digit ends in 0,2,4,6,8

The last digit of 25 is 5

Since 5 is not equal to 0,2,4,6,8:
then 25 is not divisible by 2

##### Divisibililty Check for 3

Sum of the digits is divisible by 3

The sum of the digits for 25 is 2 + 5 = 7

Since 7 is not divisible by 3:
Then 25 is not divisible by 3

##### Divisibililty Check for 4

Take the last two digits
Are they divisible by 4?

The last 2 digits of 25 are 25

Since 25 is not divisible by 4:
Then 25 is not divisible by 4

##### Divisibililty Check for 5

Number ends with a 0 or 5

The last digit of 25 is 5

Since 5 is equal to 0 or 5:
Then 25 is divisible by 5

##### Divisibililty Check for 6

Divisible by both 2 and 3

Since 25 is not divisible by 2 and 3:
Then 25 is not divisible by 6

##### Divisibililty Check for 7

Multiply each respective digit by 1,3,2,6,4,5
Work backwards
Repeat as necessary

5(1) + 2(3) = 12

Since 12 is not divisible by 7:
Then 25 is not divisible by 7

##### Divisibililty Check for 8

Take the last three digits
Are they divisible by 8

The last 2 digits of 25 are 25

Since 25 is not divisible by 8:
Then 25 is not divisible by 8

##### Divisibililty Check for 9

Sum of digits divisible by 9

The sum of the digits for 25 is 2 + 5 = 7

Since 7 is not divisible by 9:
Then 25 is not divisible by 9

##### Divisibililty Check for 10

Ends with a 0

The last digit of 25 is 5

Since 5 is not equal to 0:
Then 25 is not divisible by 10

##### Divisibililty Check for 11

Σ odd digits - Σ even digits = 0
or 25 is a multiple of 11

25

2

Odd Sum = 2

25

5

Even Sum = 5

##### Take the difference:

Δ = Odd Sum - Even Sum

Δ = 2 - 5

Δ = -3

##### Divisibility Check:

Because Δ / 11 = 2.2727272727273:
Then 25 is NOT divisible by 11

25 is divisible by
(5)

2 is our tens digit
5 is our ones digit
Ln(25) = loge(25) = 3.2188758248682
25 is divisible by
(5)

2 is our tens digit
5 is our ones digit
Ln(25) = loge(25) = 3.2188758248682
25 is divisible by
(5)
##### How does the Number Information Calculator work?
Free Number Info Calculator - Calculates number info for a positive integer
This calculator has 1 input.

### What 4 concepts are covered in the Number Information Calculator?

integer
a whole number; a number that is not a fraction
...,-5,-4,-3,-2,-1,0,1,2,3,4,5,...
number
an arithmetical value, expressed by a word, symbol, or figure, representing a particular quantity and used in counting and making calculations and for showing order in a series or for identification. A quantity or amount.
property
an attribute, quality, or characteristic of something
tally
a vertical line used to record counting
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