document.write( "Question 99209: The sum of seven consecutive integers is 980. How many of them are prime? Name the prime numbers. \n" ); document.write( "

Algebra.Com's Answer #72173 by Adam(64) $\"\"$ $\"About$

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seven consecutive integers - if we take 980/7 = 140, we can suppose that 140 is middle value and probably even middle term, that means that there are 3 on left and 3 on right- whole sequence is thus 137,138,139,140,141,142,143 every of theese numbers have to be checked for beiing primal 137 - yes, 138 can be divided by 2, 139 - yes, 140- i.e. 2, 141 - 3, 142 - 2,143 - 11
\n" ); document.write( "two of them are primal = 137 and 139 \n" ); document.write( "

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