A heap of stones can be made up into groups of 21. When made up i...

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A heap of stones can be made up into groups of 21. When made up into groups of 16, 20, 25 and 45 there are 3 stones left in each case. How many stones at least can there be in the heap?

A. 7203

B. 2403

C. 3603

D. 4803

Answer & Explanation

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