How to find the rectangular numbers
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Step-by-step explanation:
The numbers 2 is a rectangular number because it is 1 row by 2 columns. The number 6 is a rectangular number because it is 2 rows by 3 columns and the number 12 is a rectangular number because it is 3 rows by 4 columns.if we observe these numbers carefully,we can notice that ‘n-th’ rectangular number is ‘n(n+1)’.
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