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: 4, 2, 14 Row 2: 8, 7, 71 Row 3: 7, 5, ?
- 74
- 24
- 144
- 47
Answer
D. 47
Solution
Third number = ab + a + b (with a = first number, b = second number). Row 1: 4, 2 → 14; Row 2: 8, 7 → 71. Row 3: 7, 5 → 47.
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: 11, 5, 96 Row 2: 11, 7, 72…
- In each row, the third number is obtained from the first two by the same rule. Find the missing number. Row 1: 9, 2, 77 Row 2: 7, 2, 45…
- In each row, the third number is obtained from the first two by the same rule. Find the missing number. Row 1: 7, 3, 20 Row 2: 12, 11, 46…
- In each row, the third number is obtained from the first two by the same rule. Find the missing number. Row 1: 12, 4, 36 Row 2: 11, 5, 37…
- In each row, the third number is obtained from the first two by the same rule. Find the missing number. Row 1: 6, 5, 61 Row 2: 12, 5, 169…
- 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…
- 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…