math,correction
posted by student .
can someone correct this for me parts AE and if i am wrong can you help me....please
How many 7digit telephone numbers are possible if the first digit cannot be zero and.....
a) only odd digits may be used?
my answer: 8125
b) the telephone number must be multiple of 10(that is , it must end in zero)?
my answer: 1,000,000
c) the telephone number must be a multiple of 100?
my answer 100,000
d) the first 3 digits are 481?
my answer 10,000
e) no repetitions are allowd?
my answer: 120
I will be happy to critique your work.
Respond to this Question
Similar Questions

MATH Trouble
I have no idea what this problem means: For how many twodigit numbers if the ones digit larger than the tensdigit? 
math,correction, bobpursly
Since when is 5^7 =8125? 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= 
math
use the clues to find the 7th digit mystery number. * Its is between 1 and 2 million * the first three digits are the same the least possible digit is in the thousands place. *the greatest possible digit is in the ones place * the … 
Math
How many odd fourdigit numbers, all of the digit different can be formed from the digits 0 to 7, if there must be a 4 in the number? 
Math problems
i am a fourdigit number with the digits in order. my first two digits are the first two odd numbers. my last two digits are the last two singledigit even numbers PLEASE HELP 
Math problems Help Please!!!!!!
i am a fourdigit number with the digits in order. my first two digits are the first two odd numbers. my last two digits are the last two singledigit even numbers 
MATH ( PROBABILITY)
Security codes in Fiji are made up of 4 digits. How many different 4digit codes are possible i)If the first digit cannot be zero. ii)If the first digit cannot be zero and digits cannot be repeated. 
Math. Explain
From the digits 1, 2, 3, and 4, how many positive integers are less than 100,000? 
mathpermutuation
a four digit serial number needs to be created using digits 09. first digit is even , no digit is repeated , last digit is odd 
math
given the digits 0,1,2,3,4,5,6, and 7 find the number of possibilities in each category four digit numbers, odd three digit numbers and three digit numbers without repeating digits.