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 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?

Matching exercise

Match the items on the right to the items on the left.

Step 1

Step 2

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Step 4

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