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Secondary 1 | Maths
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plz help the qn is 56k is a multiple of 140. find the smallest value of k given that k is a whole no.
Date Posted: 2 months ago
Views: 58
LCM for 56 and 140 is 280.
280 ÷ 56 = 5
k = 5
Your answer is correct.
280 ÷ 56 = 5
k = 5
Your answer is correct.
See 1 Answer
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There
Date Posted:
2 months ago
tysm but im confused on how did the index notation for 140 become 2 to the power of 3 times 5 times 7 i thought it was 2 to the power of 2?
140=56k
56=2^3 * 7
Then equate
140=2^3 * 7 * k
2^2*3*5*7=2^3*7*k
By observation,
K=5
56=2^3 * 7
Then equate
140=2^3 * 7 * k
2^2*3*5*7=2^3*7*k
By observation,
K=5
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