Q1.
In S.I principal will remain same for each and every year.
(a) False (b) True (c) Can't say
Solution.
(b) True
Solution
Q2.
The S.I on a sum of money is 1/16 of the principal, and number of years is equal to rate percent per annum . find the rate percent.
(a) 2.5% (b) 3% (c) 4% (d) 4.5%
Solution.
P/ 16
=
P x t2/ 100
t
2 =
100/ 16
t =
10/ 4
r = t = 2.5
Solution
Q3.
At a certain rate of S.I Rs.800 amounts to Rs.920 in 3 years. If the rate of interest be increased by 4% what will be amount after 2 years.
(a) Rs.1400 (b) Rs.800 (c) Rs.944 (d) Rs.1000
Solution.
S.I =
Pnr/ 100
120 =
800 x 3 x r/ 100
r = 5%
New rate 5 + 4 = 9%
New rate =
800 x 2 x 9/ 100
= 144
Amount = P + SI = 800 + 144 = 944
Solution
Q4.
In the case of annuity due payment is made at the end of the period.
(a) True (b) False (c) Can't say
Solution.
(b) False
Solution
Q5.
A principal of Rs.4000 is lent out two parts in such a way that the interest on one part at 10% for 4years is equal to that on another part at 8%
for 5 years . find the two sums.
(a) 2000 each (b) 1000,2000 (c) 3k,k (d) 2.5k,1.5k
Solution.
(a) 2000 each
S
1 : S
2 =
1 / r1 t1
:
1 / r2 t2
S
1 : S
2 =
1/ 40
:
1/ 40
S
1 : S
2 = 1 : 1
Solution
Q6.
Cost price of 12 articles is equal to the selling price of 10 articles. find the profit percent.
(a) 5% (b) 10%
(c) 20% (d) 30%
Solution.
Profit % =
x - y/ y
x 100%
=
12 - 10 / 10
x 100
=
200/ 10
= 20%
Solution
Q7.
The S.I on a certain sum of money at 4% per annum for 6years is Rs.90 more than the interest on the same sum for 5 years at 5% per annum .
find the sum.
(a) 9k (b) 10k (c) 11k (d) 12k
Solution.
Sum =
Difference in interest x 100/ r1 t1 - r2 t2
=
90 x 100/ 25 - 24
= 9000
Solution
Q8.
Rs.200 is invested at the end of each month if interest rate is 6% per annum compounded monthly. find the future value of the annuity after 10 month.
(1 + 0.005)10 = 1.0511
(a) 2400 (b) 1800 (c) 2044 (d) 1000
Solution.
(c) 2044
Solution
Q9.
Find a single discount which is equivalent to two discounts of 10% and 20% .
(a) 30% (b) 21% (c) 15% (d) 28%
Solution.
[r1 + r2 - (r1.r2)/100]%
[10 + 20 - (10 x 20)/100]%
= [30 - 200/100]%
= 28%
Solution
Q10.
A person sells an article at a profit of 10%. If he had bought it at 10% less and sold it for Rs.25 more, he would have gained 25%
. find the CP.
(a) Rs. 900 (b) Rs. 1800 (c) Rs. 1000 (d) Rs. 4800
Solution.
(c) Rs. 1000
Solution