Question
51, 60, 78, ?, 141,
186 What will come in place of the question mark (?) in the following series?Solution
51 + 9 × 1 = 60, 60 + 9 × 2 = 78, 78 + 9 × 3 = 105, 105 + 9 × 4 = 141, 141 + 9 × 5 = 186
- Two cars ‘X’ and ‘Y’, which were 750 km apart, started traveling towards each other at the same time and met after 6 hours. If the speed of car ‘...
- A train can normally cover 200 metres in 8 seconds. How much distance (in km) can the train cover in 3 hours if it travels at 150% of its normal speed?
- ‘X’, ‘Y’ and ‘Z’ can complete one lap around a circular track in 10 seconds, 15 seconds, and 20 seconds respectively. If they all start from th...
The speed of ‘A’ and ‘B’ is 60 km/hr and 30 km/hr, respectively. If the distance covered by ‘A’ in ‘x’ hours is 240 km more than that by...
A bus initially traveling at a speed of 55 km/hr increased its speed by 12 km/hr after ‘t’ hours and then traveled for (t + 6) hours more. If the bu...
Parag starts chasing a Vipul, 3 hours after the Vipul starts running. Parag takes 4 hours to catch the Vipul. If the average speed of the Parag is 28 km...
- A bus travels from point A to point B at a speed of 48 km/h and makes the return trip from B to A at a speed of 56 km/h. If the total time taken for the ro...
- A spherical ball has a diameter of 56 cm. Find its total surface area.
Person 'A' begins a journey from Punjab to Delhi, driving initially at 120 km/hr. Every 36 minutes, he reduces his driving speed by 5 km/hr. If the dist...
A boat covers a distance of 900 metres upstream in 36 seconds and the same distance downstream in 24 seconds. Find the speed of the boat in still water.
Relevant for Exams:
