RRB NTPC Practice Questions — All Questions

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

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

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

The LCM of 4 and 6 is:

• a.24
• b.10
• c.12✓
• d.6

The least common multiple of 4 and 6 is 12.

30% of 200 is:

• a.50
• b.90
• c.30
• d.60✓

0.30 x 200 = 60.

If 5 pens cost 100, then 8 pens cost:

• a.150
• b.160✓
• c.140
• d.120

One pen = 20; 8 x 20 = 160.