Question
The average of four consecutive odd numbers is 47. What
is the largest of these numbers?Solution
Let the four consecutive odd numbers be x, x + 2, x + 4, x + 6. Their average is (x + x + 2 + x + 4 + x + 6)/4 = 47. Simplify: (4x + 12)/4 = 47. 4x + 12 = 188. 4x = 176. x = 44. The largest number = x + 6 = 44 + 6 = 50. Correct Option: c
A train crosses a man and a platform that is 480 meters long in 12 seconds and 36 seconds, respectively. Given this information, calculate the speed of ...
An athlete running at three-quarters of her average speed takes 25 minutes extra than her usual time to finish a marathon. Find her usual time to finish...
The speed of a bike increases by 8 km/hr after every 1 hour. If the distance travelled by the bike in 1st hour is 12 km, the find the total distance tra...
The speeds of 'Pawan' and 'Qureshi' are in the ratio of 8:5. If the total time they take to individually cover 400 km each sums up to 65 hours, what is ...
A rabbit is 600 metres ahead of a tiger when the tiger starts chasing it at a speed of 22 m/s. If the rabbit runs at 14 m/s, then find the time taken by...
In a 1200 m race, bike A beats bike B by 100 m. bike B beats bike C by 100 m in a 600 m race. If bike A beats bike C by 30 sec in a 720 m race, then wha...
A train travels at an average speed of 75 km per hour without stoppage and with stoppages it covers the same distance at an average speed of 55 km/hr. H...
‘A’ and ‘B’ started moving towards each other at same time with a speed of 16 km/hr and 14 km/hr, respectively. If the distance covered by ‘A�...
- A truck covers the distance from Depot A to Depot B at 30 km/h and returns at 45 km/h. Find its average speed.
A man reaches his destination in 6 hours at his usual speed. If his speed is reduced by (1/4), he travels 30 km less in the same time. What is his usual...
Relevant for Exams:
