SSC Government Jobs Exams Numerical Ability Simple & Compound Interest

RS 12100 is divided into three parts such that they become equal after1, 2, 3 years respectively. The rate of simple interest being 7% per annum in all case the smallest part is:

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let amount is divided into x,y,z
now according to que. [(x*7*1)/100] =[(y*2*7)/100]=[(z*3*7)/100]=k (say)
here x=100k/7
y=100k/14
z=100k/21
now
total sum=x+y+z=100k/7+100k/14+100k/21
12100=1100k/42

So k=462,
hence smallest part will be z=100k/21=46200/21=2200 ans
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