RRB / Railways Maths & Reasoning Mock Test
2 free timed sets · 6 questions · 4 easy / 2 moderate / 0 hard · solutions for every question
All Maths & Reasoning sets
Sample Maths & Reasoning questions
1. The LCM of 12, 15 and 20 is:
- (A) 60
- (B) 120
- (C) 180
- (D) 240
Show answer
(A) 60. Concept: LCM (lowest common multiple) is the smallest number divisible by all the given numbers. Formula: LCM = product of the highest powers of every prime present in any of the numbers. Steps: 12 = 2² × 3 15 = 3 × 5 20 = 2² × 5 Highest powers: 2², 3, 5 LCM = 4 × 3 × 5 = 60 Why others are wrong: - B) 120, C) 180 and D) 240 are all common multiples, but not the lowest. Remember: LCM takes the highest power of each prime; HCF takes the lowest power of the common primes. For two numbers, LCM × HCF = product of the numbers.
2. A speed of 60 km/h in metres per second is approximately:
- (A) 16.67 m/s
- (B) 20 m/s
- (C) 15 m/s
- (D) 18 m/s
Show answer
(A) 16.67 m/s. Concept: Converting speed units — km/h to m/s. Formula: 1 km/h = 1000 m / 3600 s = 5/18 m/s. So m/s = km/h × 5/18. Steps: 60 × 5/18 = 300/18 = 16.67 m/s (= 50/3 m/s) Why others are wrong: - B) 20 m/s = 72 km/h. - C) 15 m/s = 54 km/h. - D) 18 m/s = 64.8 km/h. Remember: km/h → m/s: × 5/18; m/s → km/h: × 18/5. Anchors: 36 km/h = 10 m/s, 72 km/h = 20 m/s, 90 km/h = 25 m/s, 108 km/h = 30 m/s.
RRB / Railways Maths & Reasoning — FAQs
Is the RRB / Railways Maths & Reasoning mock test free?
Yes. All 2 Maths & Reasoning sets are free, need no signup, and give instant scores with a solution for every question.
How many Maths & Reasoning questions are there for RRB / Railways?
6 questions across 2 sets: 4 easy, 2 moderate and 0 hard.
Will I get the same questions again?
No. Each attempt draws a fresh random subset, shuffles the order and options, and prefers questions you have not seen on this device. The Surprise Set draws from the whole subject pool.
Can I choose difficulty and timer?
Yes — pick Easy, Moderate, Hard or Mixed, and choose no timer, 10 or 20 minutes, or the real exam pace.