Question

Date
Page
1. Find the least square number exactly
divisible
by each one of the number 6, 9, 10
and 20.​

Answer 1

Answer:

900

Step-by-step explanation:

The smallest number divisible by 6, 9, 15 and 20 is their L.C.M. i.e. 180 Resolving the L.C.M. as prime factors we get, 180= 2 × 2 × 3 × 3 × 5

To make it perfect square multiply by 5 then it becomes, 180= 2 × 2 × 3 × 3 × 5 × 5

Which implies 180 × 5 = 900

Answer 2

Answer:

900

Step-by-step explanation:

LCM of 6 = 2*3

LCM of 9 = 3*3

LCM of 10 = 2*5

LCM of 20 = 2*2*5

Total = 2*3*3*3*2*2*5 = 1,800

So, 1,800 ÷ 2 = 900

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