Question
PSLE
Letters X, H and B formed a patten as shown below.

X H B X H X H B X H X H B X H . . .

If there are 137 'X', what is the greatest possible number of letters in the pattern?
2 m

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PSLE
Letters X, H and B formed a patten as shown below.

X H B X H X H B X H X H B X H . . .

If there are 137 'X', what is the greatest possible number of letters in the pattern?