The product of two 2digit number is 1938. if the product of their units digit is 28 and that of their tens digit is 15 find the number
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Answered by
82
Factor 1938.
1938 = 2 x 969 = 2 x 3 x 323 = 2 x 3 x 17 x 19.
The two desired numbers are products of these factors.
Since the product of the unit's digits is 28, a little trial inspection leads to
(3x19) and (2x17), i,e, 57 and 34,
which satisfy the ten's digit rule as well.
So the numbers are 34 and 57
Answered by
2
Factor 1938.
79
1938 = 2 x 969 = 2 x 3 x 323 = 2 x 3 x 17 x 19.
The two desired numbers are products of these factors.
Since the product of the unit's digits is 28, a little trial inspection leads to
(3x19) and (2x17), i,e, 57 and 34,
which satisfy the ten's digit rule as well.
So the numbers are 34 and 57
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