why does no other prime number end in 5? please can u explain your answer?
2007-09-16 06:49:23 · 18 answers · asked by noname 2 in Science & Mathematics ➔ Mathematics
Because any number that ends in five is divisible by 5, so it cant be a prime number
2007-09-16 06:52:17 · answer #1 · answered by Anonymous · 1⤊ 1⤋
Because any number ending in 5 is always divisible by 5, thus making it not prime.
2007-09-16 13:52:47 · answer #2 · answered by dr_no4458 4 · 1⤊ 0⤋
other than the number 5, all numbers ending in 5 are divisible by 5
2007-09-17 15:01:57 · answer #3 · answered by fi 1 · 0⤊ 0⤋
Becasue any number that ends in 5 van me divided by 5 and a prime number has two factors one and itself. So 5 is prime but 25 would not be though.
2007-09-16 13:57:07 · answer #4 · answered by Rocketman 6 · 0⤊ 0⤋
Because all other numbers ending in 5 are part of the 5 times table.
2007-09-16 13:56:46 · answer #5 · answered by *Angel* 5 · 0⤊ 0⤋
Any number that ends in 5 is divisible by 5, so
5 is the only such prime.
2007-09-16 14:09:36 · answer #6 · answered by steiner1745 7 · 0⤊ 0⤋
any number that ends in 5 is divisible by 5
2007-09-16 13:55:35 · answer #7 · answered by sfroggy5 6 · 0⤊ 0⤋
You've got many of the same correct answers. To exercise your brain while you are driving, take the number from the license plate of the car in front of you and break it down into prime numbers. I've been doing that for years. I like to multi-task--work on prime numbers, drive a car over the speed limit (gotta keep up with traffic), and talk on the phone. Sometimes I add in dashboard dining.
2007-09-16 13:57:59 · answer #8 · answered by IRENE THE BOOKIE 3 · 0⤊ 0⤋
because any no. ending in 5 is divisible by 5, and therefore not a prime number.
2007-09-16 13:52:40 · answer #9 · answered by mrs_b 2 · 1⤊ 1⤋
A prime no is the one which by defination is divisible by one & itself. So any no., other than 5,ending with 5 , will be divisible by5,contradicting the defination of a prime no. ans
2007-09-16 14:11:05 · answer #10 · answered by MAHAANIM07 4 · 0⤊ 0⤋