Directions (1-4): A number arrangement machine when given an input line of words and numbers rearranges them following a particular rule in each step. The following is an illustration of input and rearrangement.
Input: 28465 79784 63452 34867 93275
Step I: 52684 84797 24536 67843 57239
Step II: 24536 57239 52684 67843 84797
Step III: 4 25 36 49 64
Step IV: 20 115 250 385 540
Step V: 460 2645 5750 8855 12420
And Step V is the last step of the arrangement. As per the rule followed in the above steps, find out in each of the following questions the appropriate step for the given input:
Input: 28465 79784 63452 34867 93275
What is the product of the digits of 1st and last digit of the highest number in the final step?
Correct Answer :
8
Solution :
The correct answer is 8.
Let us trace the numbers in the final step (Step V) of the arrangement machine:
Step V: 460 2645 5750 8855 12420
From the above step, we identify the highest number in the sequence, which is 12420.
To find the product of the first and last significant digits of this highest number (12420), we take the digits 2 and 4:
Therefore, the product of the digits is 8.
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