How many times does 5 occur in the factorisation of 1225?
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1225 can be factorised as 1225=5×5×7×7,
Here, 5 occurs twice in the factorisation of 1225.
How many times does 2 occur in the factorisation of 720?
How many times does 2 occur in the factorisation of 154?
How many times does 9 occur between 1 to 100?