Hence the "Constant Difference".
Such questions usually appear in Paper 2 of P5/P6 exams.
Calculator usage is allowed.
Brad, Harry and Lawrence have some toy trucks.
Brad has 88 toy trucks, Harry has 150 toy trucks and
Lawrence has 20 toy trucks.
After Harry gave Brad and Lawrence equal number of his toy trucks,
Brad now have thrice as many toy trucks as Lawrence.
How many toy trucks did Harry have at the end?
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