Civil Service Exam Reviewer · Logical Reasoning · hard
In each row, the third number is obtained from the first two by the same rule. Find the missing number. Row 1: 7, 3, 40 Row 2: 8, 2, 60 Row 3: 11, 8, ?
- 185
- 361
- 107
- 57
Answer
D. 57
Solution
Third number = a² − b² (with a = first number, b = second number). Row 1: 7, 3 → 40; Row 2: 8, 2 → 60. Row 3: 11, 8 → 57.
More Logical Reasoning questions
- In each row, the third number is obtained from the first two by the same rule. Find the missing number. Row 1: 6, 4, 18 Row 2: 10, 6, 50…
- In each row, the third number is obtained from the first two by the same rule. Find the missing number. Row 1: 8, 3, 21 Row 2: 11, 9, 24…
- In each row, the third number is obtained from the first two by the same rule. Find the missing number. Row 1: 12, 11, 155 Row 2: 8, 2, 26…
- In each row, the third number is obtained from the first two by the same rule. Find the missing number. Row 1: 12, 9, 51 Row 2: 10, 9, 47…
- In each row, the third number is obtained from the first two by the same rule. Find the missing number. Row 1: 6, 5, 1 Row 2: 9, 8, 1 Row…
- In each row, the third number is obtained from the first two by the same rule. Find the missing number. Row 1: 12, 3, 180 Row 2: 8, 5, 104…
- In each row, the third number is obtained from the first two by the same rule. Find the missing number. Row 1: 11, 4, 117 Row 2: 12, 4…
- In each row, the third number is obtained from the first two by the same rule. Find the missing number. Row 1: 7, 6, 43 Row 2: 9, 6, 57…
- If 8 ★ 3 = 1124, 9 ★ 4 = 1336, then 7 ★ 3 = ?
- If 8 ★ 6 = 1448, 8 ★ 2 = 1016, then 9 ★ 5 = ?