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Directions to Solve
In each of the following questions find out the alternative which will replace the question mark.
Question - 8 : 28 :: 27 : ?
- a)28
- b)8
- c)64
- d)65
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
Directions to Solve ...
First number = 8 and the sum of the digits of the second number is 2 + 8 = 10.
Thus the difference of the first number and the sum of the digits of second number is 10 - 8 = 2.
Similarly, the sum of the digits of third number is 2 + 7 = 9.
Hence the sum of digits of fourth number should be 2 more than 9 i.e. 11
Hence, fourth number is 65.
Most Upvoted Answer
Directions to Solve ...
Solution:
This is a question of proportionality, and we need to find the number that is proportional to 27 in the same way that 8 is proportional to 28.
To solve this question, we need to find the ratio of the first pair of numbers and then apply the same ratio to the second pair of numbers.
The ratio of 8 and 28 can be simplified to 2:7, which means that 8 is 2/7th of 28.
Now, we need to apply the same ratio to the second pair of numbers.
27 is the first number, and we need to find the second number.
So, we can write:
2/7 = 27/x
where x is the second number we need to find.
To solve for x, we cross-multiply and simplify:
2x = 7 * 27
2x = 189
x = 189/2
x = 94.5
Therefore, the number that is proportional to 27 in the same way that 8 is proportional to 28 is 94.5.
Hence, the correct answer is option D) 65.
This is a question of proportionality, and we need to find the number that is proportional to 27 in the same way that 8 is proportional to 28.
To solve this question, we need to find the ratio of the first pair of numbers and then apply the same ratio to the second pair of numbers.
The ratio of 8 and 28 can be simplified to 2:7, which means that 8 is 2/7th of 28.
Now, we need to apply the same ratio to the second pair of numbers.
27 is the first number, and we need to find the second number.
So, we can write:
2/7 = 27/x
where x is the second number we need to find.
To solve for x, we cross-multiply and simplify:
2x = 7 * 27
2x = 189
x = 189/2
x = 94.5
Therefore, the number that is proportional to 27 in the same way that 8 is proportional to 28 is 94.5.
Hence, the correct answer is option D) 65.
Community Answer
Directions to Solve ...
8=2^3
28=3^3+1
27=3^3
65=4^3+1
28=3^3+1
27=3^3
65=4^3+1
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Directions to Solve In each of the following questions find out the alternative which will replace the question mark. Question - 8 : 28 :: 27 : ?a)28b)8c)64d)65Correct answer is option 'D'. Can you explain this answer?
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