Which roll number is a perfect cube?
Information Given:
Options: 216, 225, 243, 256
Logic:
Check which number is n³.
Explanation:
216 = 6³
225 = 15² (not cube)
243 = 3⁵ (not cube)
256 = 4⁴ (not cube)
Short Trick:
Remember small cubes → 1, 8, 27, 64, 125, 216, 343.
Final Answer:
216
Final Correct Option:
A
English
80 Questions
160 Marks
60 Mins English English20 Questions40 Marks12 Mins English English80 Questions160 Marks60 Mins EnglishWhich roll number is a perfect cube?
Four number-pairs are given, three follow a pattern. Choose the odd pair.
Find the odd one out.
Four number-sets have been given, out of which three are alike in some manner and one is different. Select the number-set that is different.(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)
In three of the following four number pairs, the numbers are related in the same way and thus form a group. Which number pair DOES NOT belong to that group?
(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 – Operations on 13 such as adding / subtracting /multiplying to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)
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