150 students are studying English, Maths or both. 62 per cent of
students study English and 68 per cent are studying Maths. How
many students are studying both?
The simple interest on a certain sum for 2.5 years at 12 per cent per
annum is ₹ 300 less than the simple interest on the same sum for
4.5 years at 8 per cent per annum. Find the sum.
The simple interest on a certain sum for 8 years at 12 per cent per
annum is ₹ 3120 more than the simple interest on the same sum for
5 years at 14 per cent per annum. Find the sum.
In how many years will the simple interest on a certain sum be 4.05
times the principal at 13.5 per cent per annum?
₹ 9000 becomes ₹ 18000 at simple interest in 8 years. Find the rate
per cent per annum.
Divide ₹ 10000 in two parts so that the simple interest on the first
part for 4 years at 12 per cent per annum may be equal to the simple
interest on the second part for 4.5 years at 16 per cent per annum.
In a debate competition, the judges decide that 20 per cent of the
total marks would be given for accent and presentation. 60 per cent
of the rest are reserved for the subject matter and the rest are for
rebuttal. If this means 8 marks for rebuttal, then find the total marks.
Harish bought a gas-chullah for ₹ 900 and later sold it to Archana
at a profit of 5 per cent. Archana used it for a period of two years and
later sold it to Babita at a loss of 20 per cent. For how much did
Babita get it?
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