Friday

February 27, 2015

February 27, 2015

Posted by **bobpursley** on Friday, July 6, 2007 at 12:59pm.

if a number is a multple of ten, that means the last digit is zero. The leading digit cannot be zero.

9*10^5*1

on c, again, the leading digit cannot be zero.

d is right

e. no leading zero is allowed. 9*9*8*7*6*5*4= ?

can someone correct this for me parts A-E and if i am wrong can you help me....please

How many 7-digit telephone numbers are possible if the first digit cannot be zero and.....

a) only odd digits may be used?

5^7= 8125

my answer: 8125

b) the telephone number must be multiple of 10(that is , it must end in zero)?

10^6*1=1,000,000

my answer: 1,000,000

c) the telephone number must be a multiple of 100?

10^5*1*1=100,000

my answer 100,000

d) the first 3 digits are 481?

1*1*!*10^4=10,000

my answer 10,000

e) no repetitions are allowd?

10 combination 7 = 120

my answer: 120

oops for the part a: 5^7 = 78125

part e: 544320

i need help with c

**Answer this Question**

**Related Questions**

math - i have a six digit question my 100 thousands is one less than my ones ...

4th grade - i am a 5 digit number my tens digit is the sum of my hundreds digit ...

Math - Iam a 5digit number my tens digit is the sum of my hundreds digits and ...

math - t is a 7-digit even number.there is no repetition of digits.the digit 5 ...

math,correction - can someone correct this for me parts A-E and if i am wrong ...

math - i am a number greater than 70000 but less than 90000. My ten digit is the...

Algebra - Math HW HELP! - 1) It is a five-digit whole number. 2) It is a ...

math - The number uses every number 0-9 the numbers are used only once the ...

Math - What is the number between 149000 and 150000 which has a tens digit that ...

math - *The number has 8 digits, none of the digits are the same. *It is evenly ...