Two of the numbers I wrote on my paper are the greatest prime numbers less than 100 that differ by 4 . What is their sum?

A.
162
B.
172
C.
182
D.
none of above
Mathematics
Competition
Math League
Exam No:2020 First Round Grades 8-9 Year:2020 Question No:23

Answer:

A

Knowledge points:

G8-9 - Number Theory - Digit Logic & Manipulation

Solution:

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