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There are only 3 ways in which just one can be defective:
only the first is defective
only the second is defective
only the third is defective
According to the rule of multiplication, 
A certain sum of money becomes 2500 in 6 years and Rs. 3240 in 10 years at any certain rate of simple interest. Find the principal amount.
A man invested certain sum at simple interest of r% p.a. such that it amounts to 150% of itself in 5 years. Find the interest earned when Rs. 2200 is in...
Simple interest earned on an amount of Rs.1200 at rate of R% per annum after 2 years is Rs.216. Find the simple interest earned on an amount of Rs.1400 ...
A shopkeeper marked an article ‘A’ 60% above the cost price and sold it for Rs. 2016 after giving a certain discount while he sold an articl...
A sum of ₹15,000 is divided into two parts. One part is invested at 10% simple interest per annum, and the other part is invested at 15% simple intere...
A sum of Rs. 6120 is invested at simple interest for 2 years. If the rate interest for first year is 15% p.a. while 25% p.a. for second year, then find ...
A sum of money becomes ₹12,000 in 2 years and ₹14,400 in 4 years at simple interest. What is the rate of interest per annum?
A certain sum amounts to ₹13000 after 4 years and to ₹16000 after 8 years at the same rate percent p.a. at simple interest. The simple interest (in ...
"R" made certain investments with a 40% annual compound interest rate that is compounded quarterly. If, 9 months later, he receives Rs. 1,99,650, then t...
Ravi lends Rs. 10,000 to two of his friends. He gives Rs.5,000 to the first at 15% p.a. simple interest. Ravi wants to make a profit of 20% on the whole...
