R-SAT Exam Numerical Ability Area and Volume

If the interest on Rs.1650 be less than the interest on Rs.1800 at 4% by Rs.30, find the time for the sums are lent.
Option
a) 2
b) 4
c) 6
d) 7
e) none

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R-SAT Other Question

In the following sum * stands for which digit ?
*+1*+2*+3*+4*+*8+*2=23*
Option
a) 1
b) 5
c) 7
d) 3
e) none
The average salary of workers in an industry is Rs.200 the average salary of 150 technicians being Rs.400 and that of non-technicians being Rs. 125. what is the total number of workers?
option
a) 400
b) 450
c) 550
d) 500
e) none