I subtracted 1 from every prime less than 100 . How many of the numbers I got are multiples of 5 ?
A.
5
B.
6
C.
7
D.
8
Exam No：2020 First Round Grade 6 Year：2020 Question No：28
Answer:
A
Knowledge points:
G6 - Number Theory - Prime Factorization (Application)
Solution:
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