RRB NTPC Practice Questions — All Questions

A train travels 240 km in 4 hours. Its average speed is:

• a.50 km/h
• b.60 km/h✓
• c.70 km/h
• d.80 km/h

Speed = distance / time = 240 / 4 = 60 km/h.

The LCM of 4 and 6 is:

• a.12✓
• b.24
• c.6
• d.10

The least common multiple of 4 and 6 is 12.

30% of 200 is:

• a.30
• b.50
• c.60✓
• d.90

0.30 x 200 = 60.

If 5 pens cost 100, then 8 pens cost:

• a.120
• b.140
• c.150
• d.160✓

One pen = 20; 8 x 20 = 160.