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Math Logic (Logic) Solved Questions & Notes (2026) - Apex Rankers

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13 Total Solved Questions
~20 mins Estimated Reading Time
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Math Logic

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Q. 1 Intelligence Tests
Difficulty: Hard (1 Mark)
In order to write counting upto 100, how many times the key of the typewriter will have to be pressed?
A
100
B
192
✓ Correct
C
300
D
321
💡 Step-by-Step Explanation & Concept Rationale
9 keys (1-9) + 180 keys (10-99) + 3 keys (100) = 192 total key presses.
Q. 2 Intelligence Tests
Difficulty: Hard (1 Mark)
How many figures are required in numbering the pages of a book of 365 pages?
A
987
✓ Correct
B
789
C
879
D
873
💡 Step-by-Step Explanation & Concept Rationale
9 (1-9) + 180 (10-99) + 798 (100-365) = 987 total digits (figures).
Q. 3 Intelligence Tests
Difficulty: Hard (1 Mark)
867 is the product of two numbers, of which is 3 times the other. What is the sum of the numbers?
A
51
B
48
C
17
D
68
✓ Correct
💡 Step-by-Step Explanation & Concept Rationale
If x⋅3x=867, then x=17 and 3x=51. Sum: 17+51=68.
Q. 4 Intelligence Tests
Difficulty: Hard (1 Mark)
How often does the sum of 81459 and 54306 contain their difference?
A
3 times
B
4 times
C
5 times
✓ Correct
D
6 times
💡 Step-by-Step Explanation & Concept Rationale
Find the Sum:
\(81459+54306=135765\)

Find the Difference:
\(81459-54306=27153\)

Divide the Sum by the Difference:
\(135765\div 27153=5\)

Therefore, the sum contains their difference exactly 5 times.
Q. 5 Intelligence Tests
Difficulty: Hard (1 Mark)
If 2 masons build one wall in twelve weeks, how many walls 12 masons in two weeks?
Correct Answer / Solution Key:
-1
💡 Step-by-Step Explanation & Concept Rationale
Applying the work-rate formula (M1D1/W1=M2D2/W2), the result is 1 wall.
Q. 6 Intelligence Tests
Difficulty: Hard (1 Mark)
How should you get exactly 8 litres of milk... one 5-litre and one 2-litre container?
Correct Answer / Solution Key:
Fill up one 5-litre... [Key Text]
💡 Step-by-Step Explanation & Concept Rationale
The process involves specific iterative measurements using the two containers to reach the target volume.
Q. 7 Intelligence Tests
Difficulty: Medium (1 Mark)
A spider... 15ft up, 7ft down. Net 8ft/min. What height in 15 minutes?
Correct Answer / Solution Key:
(120 ft.)
💡 Step-by-Step Explanation & Concept Rationale
At a net rate of 8 feet per minute, the spider covers 120 feet in 15 minutes (8×15=120).
Q. 8 Intelligence Tests
Difficulty: Medium (1 Mark)
Reservoir filling at 5/hr, leaking at 2/hr. How long to fill 60 cubic meters?
Correct Answer / Solution Key:
(20 hrs.)
💡 Step-by-Step Explanation & Concept Rationale
Net filling rate is 3 cubic meters per hour (5−2=3). 60/3=20 hours.
Q. 9 Intelligence Tests
Difficulty: Hard (1 Mark)
Stranger figure: 1, 3, 8, 27, 81, 243, 729
A
243
B
27
C
8
✓ Correct
D
27
💡 Step-by-Step Explanation & Concept Rationale
The series consists of powers of 3 (30,31,32=9...); 8 is not a power of 3.
📜 Instructions / Reading Passage
4 Questions in this set
Directions: Questions 49 to 52 are based on the following road layout of City Y: All the roads in City Y are either perpendicular or parallel to one another. The roads are all straight. Roads A, B, C, D, and E are parallel to one another. Roads G, H, I, J, K, L, and M are parallel to one another. • Road A is 1 mile east of Road B. • Road B is 1/2 mile west of Road C. • Road D is 1 mile west of Road E. • Road G is 1/2 mile south of Road H. • Road I is 1 mile north of Road J. • Road K is 1/2 mile north of Road L. • Road K is 1 mile south of Road M.
Q. 10 Intelligence Tests
Difficulty: Hard (1 Mark)
Which of the following is necessarily true?
A
Road I is 1 mile north of Road L
B
Road D is 2 miles west of Road B
C
Road E and Road B intersect
D
Road M is 1 ½ miles north of Road L
✓ Correct
💡 Step-by-Step Explanation & Concept Rationale
Derived from the provided distances: K is 1 mile south of M and ½ mile north of L.
Q. 11 Intelligence Tests
Difficulty: Hard (1 Mark)
If Road E is somewhere between Roads B and C, then which of the following is false?
A
Road D is less than 1 mile from Road B
B
Road C is less than 1 ½ miles from Road D
C
Road E is less than 1 mile from Road A
✓ Correct
D
Distance Road E to B + E to C is ½ mile
💡 Step-by-Step Explanation & Concept Rationale
This spatial configuration contradicts the established road distances in City Y.
Q. 12 Intelligence Tests
Difficulty: Hard (1 Mark)
Which of the following possibilities would make two roads coincide?
A
If Road L is ½ mile north of Road L
✓ Correct
B
If Road D is 2 mile east of Road A
C
If Road I is ½ mile north of Road K
D
If Road C is 1 mile west of Road D
E
If Roads E and B are ½ mile apart or Roads H and J are ½ mile apart
💡 Step-by-Step Explanation & Concept Rationale
Based on the distances in City Y, certain displacements align parallel roads into the same coordinate.
Q. 13 Intelligence Tests
Difficulty: Hard (1 Mark)
If Road X is parallel to Road I and Road X is ½ mile south of Road J and 1 mile north of Road G, which two roads would be ½ mile apart?
A
I and X
B
X and H
✓ Correct
C
J and G
D
J and H
E
I and G
💡 Step-by-Step Explanation & Concept Rationale
Calculating the relative north-south positions of the G-M road set identifies X and H as 0.5 miles apart.
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