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How much time will it take for a sum of ₹450 to yield ₹27 as interest at 1.5% per annum of simple interest?

ICICI offers 10% compound interest per annum compounded half-yearly. Mr Kumar deposited ₹3650 on 7^th February 2020 and another ₹3650 on 7^th August 2020. Calculate the interest he earned till 7^th February 2021. Choose the option that is closest to the exact answer.

A and B can do a piece of work in 9 days and 12 days respectively. They work together for 3 days and then A leaves. In how many days after that will B complete the work alone?

A boy was riding a bicycle at the speed of 20 kmph. How much time would he have taken to cover 10 km?

The average of the monthly rainfalls for January, February, March and April was 22 cm and for February, March, April and May it was 24 cm. If the monthly rainfall in May was 20 cm, find the monthly rainfall in January

The mean of 12 observations is 18. If one more observation is included, the new mean becomes 20. Find out the 13^th observation.

A brick is an example of a ________.

If the radius of a circle is 7 cm, what will be the ratio of its area and its circumference?

Rohan wants to store 120000 litres of oil. So he bought a conical oil tank of a diameter of 7 m and a height of 9 m to store oil. Find how many litres of oil will be left after filling the whole tank? [Use π = \(\frac{22}{7}\)]

Roy is attempting a question paper where he gets 3 marks for every correct answer and 1 mark is deducted for every wrong answer. After attempting 60 questions, Roy sees that his total marks is 100. Find the number of questions he answered incorrectly.