Choose the pair which is different from the others:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 37, 4
In each pair the two numbers have the same product, 168, except one.
Option (1) 14, 12 — \(14\times12=168\)
Option (2) 24, 7 — \(24\times7=168\)
Option (3) 37, 4 — \(37\times4=148\). Its product is not 168, so 37, 4 is the odd one out.
Option (4) 42, 4 — \(42\times4=168\)
Tip: When the pairs show no pattern by difference or sum, try the product; 37 is also a prime number, which fits no factor pair of 168.