Four groups of numbers are given, out of which the numbers in three groups…
20202020
Four groups of numbers are given, out of which the numbers in three groups bear a certain common relationship. Choose the group in which the numbers are differently related.
- A.
28 - 195
- B.
18 - 81
- C.
22 - 121
- D.
38 - 361
Attempted by 113 students.
Show answer & explanation
Correct answer: A
Pattern: in each group, divide the first number by 2 and square the result to get the second number, i.e. (First ÷ 2)² = Second.
18 → (18 ÷ 2)² = 9² = 81 ✓
22 → (22 ÷ 2)² = 11² = 121 ✓
38 → (38 ÷ 2)² = 19² = 361 ✓
28 → (28 ÷ 2)² = 14² = 196, but the group shows 195, so this group does not follow the rule.
Hence the group 28 - 195 is differently related from the other three.