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Study Stuff for MCA Examinations - NIMCET
Study Stuff for MCA Examinations - NIMCET
Previous Year Question (PYQs)
In each of the following three questions, four numbers are given. Out
of these, three are alike in a certain way but the rest one is different. Choose the one which is different
from the rest three.
Solution
Check if the middle digit = sum of first and last digit:
325 → 3 + 5 = 8 ≠ 2
236 → 2 + 6 = 8 ≠ 3
178 → 1 + 8 = 9 ≠ 7
639 → 6 + 9 = 15 ≠ 3
Another pattern:
Three numbers are divisible by 1st digit, one is not.
325 → 325 ÷ 3 = not integer
236 → 236 ÷ 2 = 118 (valid)
178 → 178 ÷ 1 = 178 (valid)
639 → 639 ÷ 6 = 106.5 (not valid)
Three numbers are not divisible, one is divisible. Only 236 is divisible by its first digit.
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