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A bike travels from R to S at the speed of 30 km/hr and from S to R at speed of 20 km/hr. What is the average speed of the bike ?

What is the value of $\dfrac{(6.1)^2-(0.5)^2}{2\times3.3\times2.8}$

A principal of Rs. 18,000 becomes Rs. 36,000 in 4 years, when invested in a scheme of simple interest. If the same sum is invested in a scheme of compound interest with same yearly interest rate (compounding annually), then how much amount will be received after 2 years ?

Sumit starts his journey from point Q at 1 p.m. He drives the car at the speed of 48 km/hr for first three hours and complete the remaining journey at the speed of 36 km/hr. If Rahul starts moving towards Sumit at 6 p.m. from point Q at the speed of 51 km/hr, then at what time he will catch Sumit ?

Price of a diamond is directly proportional to the square of its weight. A man broke the diamond accidently in three pieces in the ratio of 4 : 6 : 9 respectively and thus loses Rs. 27,360. What was the original price of the diamond ?

If M1 = 25 × 36 × 72 × 55, M2 = 23 × 35 × 74 × 5 and M3 = 27 × 32 × 7 then what is the greatest common factor of M1, M2, and M3?

1. 23 × 34 × 74
2. 23 × 32 × 72
3. 23 × 33 × 72
4. 23 × 32 × 7

What is the Highest Common Factor of 12/17 and 15/34 ?

The price of a washing machine depreciates every year by 10 percent. If the value of the washing machine after 3 years will be Rs. 18225, then what is the present value of the washing machine ?

If 60 percent of total articles are sold at a loss of 40 percent and remaining articles are sold at a profit of 20 percent, then what will be the overall loss percent ?

The pie chart given below shows the number of votes received by 5 candidates in an election. The number of votes received by any particular candidate is shown as a percent of the total number of votes received by all five candidates.

What is the difference between the central angle formed by the sectors of C3 and C1?