what are the mystery numbers??
we are twin primes.
we are greater than 100 and less than 200.
the product of the sum of the digits of the first number times the sum of the digits of the second number is 80.
NOTE:twin primes are pairs of prime numbers that have a difference of two.
thx for the help....
correct answer gets 10 points!!
2007-11-17 03:20:56 · 3 answers · asked by My name=patience 3 in Science & Mathematics ➔ Mathematics
the numbers are 107 and 109
2007-11-17 03:31:27 · answer #1 · answered by athul e 2 · 2⤊ 0⤋
Either the digit sums are two apart or the numbers are --9 and --1.
In the first case the digit sums have to be 8 and 10. Since neither prime can end in 5, the possibilities are 107/109 and 161/163. But 161 isn't prime (divisible by 7).
In the second case, note that the number between them must be divisible by 3. But 119/121, 149/151, and 179/181 each don't work.
So 107/109 is the only answer.
2007-11-17 14:02:30 · answer #2 · answered by Curt Monash 7 · 0⤊ 0⤋
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2016-11-11 22:09:31 · answer #3 · answered by Anonymous · 0⤊ 0⤋