Information Given:
Number pairs:
A) 11 – 19
B) 27 – 35
C) 13 – 23
D) 17 – 29
Question: Choose the pair in which both numbers are not prime.
Logic:
Check each pair for compositeness.
Explanation:
Logic: Prime numbers have exactly two factors (1 and itself).
Step-by-step:
A) 11, 19 → both are prime ❌
B) 27 = 3 × 9 (not prime), 35 = 5 × 7 (not prime) ✅
C) 13, 23 → both are prime ❌
D) 17, 29 → both are prime ❌
Final Answer:
27 – 35
Final Correct Option:
(B)
English
80 Questions
160 Marks
60 Mins English English20 Questions40 Marks12 Mins English English80 Questions160 Marks60 Mins EnglishThree of the following four options are alike in a certain way and thus form a group. Which is the option that does NOT belong to that group?
Four triads of numbers have been given out of which three are alike in some manner and one is different. Select the one that is different.
Which roll number is a perfect cube?
Three of the following four are alike in a certain way and thus form a group. Which is the one that does NOT belong to that group?
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/deleting/ 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)
(A) 56-7
(B) 169-13
(C) 729-27
(D) 121-11
Three of the following number-pairs are alike in some manner and hence 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 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.)
Four number-pairs are given, three follow a pattern. Choose the odd pair.
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