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Question

If an integer k is divisible by 2,5 and 13, what is the next largest number that is divisible by all the 3 given numbers?


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Solution

Find the required number based on given information

If a given number is divisible by a set of numbers, then it is either the LCM or a multiple of the LCM of the set of numbers.

According to given condition k is divisible by 2,5,13

Hence, k is either the LCM or a multiple of the LCM of the numbers 2,5,13

2,5 and 13 are co prime numbers.

So the LCM of these numbers is given by the product of these numbers

Therefore, LCM=2×5×13=130

We need to find the next largest number that is divisible by 2,5 and 13 which is the next multiple of 130 after k

Hence, the required number is equal to k+130.


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