Worst Product of Amazon | FinShorts#210

Find the total number of ways in which 6, 30, 210 and 60 can be written as a product of two co-primes.

How much amount of the total oxygen is contributed by the Amazon forest in the earth's atmosphere ?

Through photosynthesis , the lungs of earth, Amazon forest is estimated to produce ..... of the total oxygen in earth's atmosphere .

H.C.F. of two numbers is 10 and their L.C.M is 210, then the product of the two numbers is: