First four multiples of 9?
A multiple of a number is the number multiplied by an integer.
The first four multiples of 9 are given by multiying the first 4 integers with number 9.
That is,
9 x 1 = 9
9 x 2 = 18
9 x 3 = 27
9 x 4 = 36
Hence, first four multiples of 9 are 9, 18, 27, 36.
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