math ( Terminology )

The " lumper " of a number is equal to the sum of all the prime numbers less than that number. If the lumper of x is equal to the lumper of x + 3, which of the following is a possible value of x ?

a. 7
b. 8
c. 9
d. 10
e. 11

please answer and explain

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  2. 👎 0
  3. 👁 90
asked by Thomas
  1. the primes are

    2 3 5 7 11 ...

    The first time there is a gap of at least 3 is at n=7, so (A)

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  2. oops. less than, not less or equal, so (B)

    2,3,5,7 are less than 8, and also less than 11.

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