42 and 36 are co-prime numbers.

True

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False

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Solution

The correct option is B
False

Co-prime numbers are numbers which have only 1 as their common factor or their highest common factor is 1.

The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42

The factors of 36 are: 1, 2, 3, 4, 6, 9, 12 , 18, 36

The common factors of 42 and 36 are 1, 2, 3, 6.
Hence, 42 and 36 are not co-prime numbers.

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Similar questions

Q. Which of the following numbers are co-prime?
(a) 24, 42
(b) 15, 36
(c) 11, 15

36 has only two factors that are prime numbers.

Using trigonometric tables, find the value of $\frac{s i n 64^{\circ} 42^{'} + c o s 42^{\circ} 20^{'}}{t a n 36^{\circ} 40^{'} + c o t 63^{\circ} 20^{'}}$

Q. Express each of the following numbers as the sum of two odd primes:

(i) 36
(ii) 42
(iii) 84

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