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Secondary 1 | Maths
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Pl help
Date Posted: 3 years ago
Views: 180
Do prime factorisation first.
8775 = 13 × 3³ × 5²
315 = 3² × 5 × 7
Their LCM is :
13 × 3³ × 5² × 7
= 8775 × 7
= 61425
Then, multiply by a factor that will get you closest to 200000
The digit in the ten thousands place is 6.
6 × 3 = 18 and 6 × 4 = 24, so we should pick the first one such that the first 2 digits don't go above 20.
Multiply by 3.
61425 × 3 = 184275
315 = 3² × 5 × 7
Their LCM is :
13 × 3³ × 5² × 7
= 8775 × 7
= 61425
Then, multiply by a factor that will get you closest to 200000
The digit in the ten thousands place is 6.
6 × 3 = 18 and 6 × 4 = 24, so we should pick the first one such that the first 2 digits don't go above 20.
Multiply by 3.
61425 × 3 = 184275
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