Mathematics MCQs
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2471.A Quadrillion has ________ zeros?
2472.The ratio of A and B's ages is 6:5. After 5 years, it becomes 9:8. What is their age difference?
2473.A and B work 7 hours a day. A completes a task in 6 days, B in 8 days. In how many days will they complete it together working 8 hours/day?
2474.Average age of A, B, C, and D is 45 years. After adding E, the average becomes 49 years. What is the age of E?
2475.An arithmetic progression has 2nd term = 20 and 8th term = 60. What is the 20th term?
2476.Two numbers are in ratio 3 : 4 and their LCM is 240. The smallest such pair’s smaller number is:
2477.Q is as much younger than R as he is older than T. If the sum of the ages of R and T is 50 years, what is the difference between R and Q's age?
2478.What is 1/6 of 2460 km?
2479.Solve the system of equations: 3x - 6y = 15 -2x + 4y = -10 What is the value of x and y?
2480.A train covers 240 km at a uniform speed. If its speed is increased by 4 km/h, it takes 0.5 hour less. What is the original speed?