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Question

Question 4.
Which of the following is not in the lowest form?
(a) 75
(b) 1520
(c) 1333
(d) 2728


Solution

(b)

We know that a fraction is in its lowest form if the HCF of their numerator and denominator is 1. Now,
(a) 75
Since HCF of 7 and 5 is 1. So, it is in its lowest form.
(b) 1520
Since HCF of 15 and 20 is 5. So, it is not in its lowest form.
(c) 1333
Since HCF of 13 and 33 is 1. So, it is in its lowest form.
(d) 2728
Since HCF of 27 and 28 is 1. So, it is in its lowest form.
Hence, option (b) is not in the lowest form.


Mathematics
NCERT Exemplar
Standard VI

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