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Cyclicity of 2: 21 = 2, 2 2 = 4, 2 3 = 8, 2 4 = 16, 2 5 = 32 Hence, we can see the last digits repeat themselves after every power of 4. So, Units digit of (12123 – 1) = Unit digit of {2(4 × 30 + 3) – 1} = {23 – 1} = 8 – 1 = 7
A train traveling at 90 km/h departs from City A toward City B, located 240 km away. Simultaneously, a car leaves City B heading toward City A at a spee...
The speed of a bike increases by 3 km/hr after every 1 hour. If the distance travelled by the bike in 1st hour is 25 km, the find the total distance tra...
A cyclist travels from town A to town B at a speed of 20 km/h and returns to town A at a speed of 30 km/h. If the total distance between the towns is 12...
A boy goes to school with a speed of 70 km/h and comes back with a speed of 30 km/h. find his average speed?
Rahul travels a certain distance with a constant speed of 18 km/h and reaches 3 hours late. If he had travelled at a constant spe...
The distance between two points 'E' and 'F' is 2,100 km. Vikram and Sameer can cover the distance between 'E' and 'F' in 42 hours and 35 hours, respecti...
The speed of a car is 30% more than that of a bike. Both of them start from a same point. After travelling for 4 hours, the speed of the bike is increas...
The distance covered by a train in (4y-1) hours are (64y3-1) km. The speed of the train is.
Amit drove for 6 hours at a speed of 60 miles per hour and for 6 hours at 50 miles per hour. What was his average speed (in miles per hour) for the whol...
