If my favorite positive number multiplied by itself has the same value as the sum when this favorite number is written 24 times and the numbers are added together, what is half the value of that sum?
A.
48
B.
144
C.
240
D.
288
Exam No：2020 First Round Grade 4 Year：2020 Question No：35
Answer:
D
Knowledge points:
G4 - Algebra - Find the Unknown (Balancing)
Solution:
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