Q: Which number is divisible by all numbers from 1 to 10 ?
Ans: If we multiply two numbers then its product will be divisible by both the numbers . e.g 5 × 7 = 35 .
Similarly , If we multiply all the numbers from 1 to 10 then its product will be divisible by all the numbers 1 to 10
i.e. 1 × 2 × 3 × 4 × 5 × 6 × 7 × 8 × 9 × 10 .
But number 8 is divisible 4 and 4 is divisible by 2 , similarly 10 is divisible by 5 so by considering these concepts the product of 5 × 7 × 8 × 9 will be divisible by all the numbers from 1 to 10 .
Hence the Required number = 5 × 7 × 8 × 9 = 2520