A star is (8.1 ☓ 1023) km away from the earth. Suppose light travels at the speed of (3.0 ☓ 105) per second. How long will it take the light from the star to reach the earth?
Subject: Mathematical Problems Multiple Choice Quiz ( MCQ ) and Answer
Car A travels at the speed of 65 km÷hr and reaches its destination in 8 hours. Car B travels at the speed of 70 km÷hr and reaches its destination in 4 hours. What is the ratio of the distance covered by car A and car B respectively?
A is traveling at 72 km per hour on a highway while B is traveling at a speed of 25 meters per second. What is the difference in their speeds in meters per second?
A car is driven at the speed of 100 km/hr and stops for 10 minutes at the end of every 150 km. To cover a distance of 1000 km, it will take?
In track meets both 100 yards and 100 meters are used as distances. By how many meters is 100 meters longer than 100 yards?
The speeds of the three cars are in the ratio 2 : 3 : 4. The ratio of the times taken by these cars to travel the same distance is?
A train leaves Delhi at 4.10 P.M. and reaches Aligarh at 7.25 P.M. The average speed of the train is 40 km/hr. What is the distance from Delhi to Aligarh?
Which of the following trains is the fastest?
A monkey climbing up a pole ascends 6 meters and slips 3 meters in alternate minutes. If the pole is 60 meters high, how long will it take the monkey to reach the top?
At present, Suresh’s age is twice the age of his daughter. After 6 years from now, the ratio of the ages of Suresh and his daughter will be 23 : 13. What is the present age of Suresh?
Reenu’s father was 38 years of age when she was born while her mother was 36 years old when her brother 4 years younger to her was born. What is the difference between the ages of her parents?
18 years ago, a man was three times as old as his son. Now, the man is twice as old as his son. The sum of the present ages of the man and his son is?
Ratio between the ages of Subhash, Prasad and Amar is 3 : 6 : 7. If the difference between the ages of Prasad and Amar is 10 years, then what is the difference between the ages of Subhash and Prasad?
The present age of Mr. Sanyal is three times the age of his son. Six years hence, the ratio of their ages will be 5 : 2. What is the present age of Mr. Sanyal?
The present ages of the three persons are in the proportion 4 : 7 : 9. Eight years ago, the sum of their ages was 56 years. The present age of the eldest person is?
The age of the mother today is thrice that of her daughter. After 12 years, the age of the mother will be twice that of her daughter. The age of the daughter today is?
The ratio of the present ages of a mother and her daughter is 7 : 1. Four years ago, the ratio of their ages was 19 : 1. What will be the mother’s age four years from now?
A man is aged three times more than his son Ronit. After 8 years, he would be two and a half times Ronit’s age. After further 8 years, how many times would he be of Rohit’s age?
The ratio of Rani’s and Komal’s ages is 3 : 5 respectively. The ratio of Komal’s and Pooja’s ages is 2 : 3 respectively. If Rani is two-fifths of Pooja’s age, what is Rani’s age?
In the equation 3x+5=15.5, choose the answer for x.
When multiplied by itself, which number is equal to 12,345,678,987,654,321?
[(1+2)*(1+5)] = ?