A number theory problem by Fox Flodnor

Number Theory Level 3

If the sum of the first 5 positive prime numbers is equal to "a". The sum of the first 7 positive odd numbers is equal to "b". And the sum of first 10 nonnegative numbers is equal to "c".

What is the value of... a+b+c?


The answer is 122.

Fox Flodnor by Fox Flodnor , 26, Philippines

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1 solution

Sudoku Subbu
Jan 17, 2015

a=2 + 3 + 5 + 7 + 11 = 28 b = 1+3+5+7+9+11+13 = 49 c=0+1+2+3+4+5+6+7+8+9 = 45 => a+b+c=28+49+45 = 122

1 Helpful 0 Interesting 0 Brilliant 0 Confused

zero is neither negative nor positive. so c should be equal to 1+2+3+4+5+6+7+8+9+10 = 55. thus, the answer should be 132...

aniket vaidya - 6 years, 1 month ago

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Zero is non-negative.

Devin Ky - 5 years, 11 months ago

my boy zero is neither positive nor negative,i too accept, but c=sum of non negetive integers . as you said before that zero is neither positive nor negative, so zero is not negetive and comes under non-negetive integers

sudoku subbu - 5 years, 11 months ago

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