1. We have two unknown positive integers m and n, whose product is less than 100. There are two additional statement of facts available: mn is divisible by six consecutive integers { j, j + 1,...,j + 5 } m + n is a perfect square.Which of the two statements above, alone or in combination shall be sufficient to determine the numbers m and n?






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  • By: anil on 05 May 2019 02.34 am
    Given, m and n are two positive integers having product less than 100 Statement 1: mn is divisible by 6 consecutive integers. This means mn must be divisible by the LCM of these 6 integers its multiples. Only numbers from 1 to 6 satisfy this with LCM 60. Any other set of 6 consecutive integers clearly exceeds 100 as its LCM. Only such number satisfying the condition is 60. 60 can further be expressed as the product of two positive integers in the following ways: 1 x 60, 2 x 30, 3 x 20, 4 x 15, 5 x 12 and 6 x 10. So, no unique values of m and n can be determined from the above. Statement 2: m + n is a perfect square. From this statement alone too no unique set of solutions can be determined. From Statements 1 and 2: Only the pair 6 x 10 satisfies the condition. Hence, both statements taken together are sufficient to answer the question, but neither statement alone is sufficient.
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