Tuesday

September 30, 2014

September 30, 2014

Posted by **alejandro** on Monday, August 5, 2013 at 2:00pm.

Answer: Old code: 5x5x5x5x5x5=15325

New code: 5x5x10x10x10=25000

The increase in the number of codes is 9375.

I don't understand why they use 5's and 10's!!!Please somebody can explain me this!!!

- math30 -
**Reiny**, Monday, August 5, 2013 at 3:10pmhow many

**even**digits are there from 0 - 9 ??

there are 5

how many digits are there from 0 to 9 ?

there are 10

so you have 5 choices as the first digit, 5 choices again for the second digit, 10 choices for the 3rd digit, etc

- math30 -
**alejandro**, Monday, August 5, 2013 at 3:31pmThanks, but what about the odd number?

- math30 -
**Steve**, Monday, August 5, 2013 at 4:07pmlet's see. You know there are 10 digits

You know there are 5 even digits.

asking now how many odd digits there are is the same as holding out both hands, and when someone says, "This one is your left hand," you ask, well, which one is my right hand?

**Answer this Question**

**Related Questions**

math - 1. a door code is made up of six unique digits the last digit is 8. 2....

Math - 1.) A security code has seven characters. Each code begins with two ...

Math problems Help Please!!!!!! - i am a four-digit number with the digits in ...

Math problems - i am a four-digit number with the digits in order. my first two ...

math - I am thinking of a two-digit number in which the sum of the digits is 9 ...

gemetry - An identification code is to consist of two letters followed by six ...

Math grd 12 - You are setting a system programing codes for a universal TV ...

MATH - What is my number if the hundreds digit is less than the tens digit and ...

math - Any of the ten digits 0 through 9 may be used in a 6-digit code, but no ...

math: probability - A locker combination has three nonzero digits, and digits ...