Question

least number that is divisible by all numbers from 1 to 10 included both =lcm from 1 to 10 =2520

Answer 1

answer is 2520

because there are 10 numbers including 1 and 10

1 2 3 4 5 6 7 8 9 10

all numbers are divisible by 1

numbers divisible by 8 are also divisible by 2 and 4

numbers divisible by 9 are also divisible by 3 and 6

so, eliminate the common factors

so, 5 7 8 and 9 are the unique ones

so, 5*6*8*9=2520


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