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 EnglishFour 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.)
Suggested Test Series
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