OKay my firned needs help.
The problems
My # is between 40 and 50 and is prime. What is it?
My # is a multiple of 10. Its a factor of 45. What is it?
My # is a factor of 20 alos of 30. WHAT is it?
My # is a multiple of 4. Its is less than 10.??
PLEASE HELPP HER!
2007-09-10 14:55:02 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
its squared for the last one too.
2007-09-10 14:57:15 · update #1
1) The prime numbers between 40 and 50 are,
41, 43 and 47
2) The number that is multiple of 10 and a factor of 45 is,
none. Because, multiples of 10 are 10, 20, 30, 40, 50, ... and factors of 45 are 3, 5, 9, 15. So, there is no common between them. As a matter of fact, there is no such numbers.
3) The number that is factor of both 20 and 30 is,
2, 5 and 10
4) The nunber that is multiple of 4 and less than 10 are,
4 and 8.
[mbk]
2007-09-15 21:07:38 · answer #1 · answered by defeNder 3 · 0⤊ 0⤋
1) Well if it's between 40 and 50 and its prime, then it has to be odd. "45" isn't prime because any number ending in 5 can be divided by 5. And we know 49 is 7*7. So the only possibilities are 41, 43, and 47. All of these are prime.
2) If it's a multiple of 10, then it has to end in 0. But the only factors of 45 are 1, 3, 5, 9, 15 and 45. So there are no numbers that are both.
3) Both numbers have several factors in common. 2, 5, 10...
4) Any multiple of 4 will do, since they all have to be less than 10.
2007-09-10 22:01:40 · answer #2 · answered by Anonymous · 0⤊ 0⤋
prime between 40 & 50 try 47
10x45=450
My # is a factor of 20 also of 30. WHAT is it? 600
My # is a multiple of 4. Its is less than 10.?? 8
2007-09-18 19:38:32 · answer #3 · answered by Will 4 · 0⤊ 0⤋
My # is between 40 and 50 and is prime. What is it?
Answer: 41, 43 and 47
My # is a multiple of 10. Its a factor of 45. What is it?
Answer: 5
My # is a factor of 20 alos of 30. WHAT is it?
Answer: 10
My # is a multiple of 4. Its is less than 10.??
Answer: 4 and 8
2007-09-15 02:50:58 · answer #4 · answered by Jun Agruda 7 · 3⤊ 1⤋
are these all describing one number???
if not then i think i have the answerS.
1. 41, 43 or 47
2. not possible unless u r dealing with decimals so would 15 work? b/c 15x3 is 45 so it is a factor of 45 and 15/10 is 1.5 so thats a multiple of 10.
3. 2,5, or 10
4. 4, or 8
2007-09-10 22:05:48 · answer #5 · answered by Anonymous · 0⤊ 0⤋
41 or 43 or 47
5
2,5 or 10
2
2007-09-10 22:03:23 · answer #6 · answered by TJTB 7 · 0⤊ 1⤋
1. 41, 43, and/or 47
2. 90
3. ??? (a typo?)
4. 4
2007-09-10 22:00:42 · answer #7 · answered by evil.spammer 2 · 0⤊ 1⤋
a: 41, 43, or 49
b: Does not exist. Did you mis-state the problem?
c: 2 or 5
d: 8
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2007-09-10 22:26:03 · answer #8 · answered by William B 4 · 0⤊ 1⤋
47
5
10, or 2, or 5
2
2007-09-10 22:02:44 · answer #9 · answered by christina f 1 · 0⤊ 1⤋
i know the first one its 44! i think
2007-09-17 20:13:15 · answer #10 · answered by Valerie5_0 2 · 0⤊ 1⤋