type 2 increase or decrease in interest rate Practice Questions Answers Test with Solutions & More Shortcuts
simple interest PRACTICE TEST [6 - EXERCISES]
type 1 basic simple interest using formula
type 2 increase or decrease in interest rate
type 3 money multiples in ‘n’ years
type 4 difference & equality of si rate & years
type 5 si on ‘n’ years & ‘x/y ‘of sum
type 6 si with ratios
Question : 11 [SSC CGL Prelim 2004]
If the annual rate of simple interest increases from 10% to 12$1/2$% , a man's yearly income increases by Rs.1250. His principal (in rupees) is
a) 45,000
b) 50,000
c) 65,000
d) 60,000
Answer »Answer: (b)
Using Rule 1,
Change in SI
= $(25/2 - 10)% = 5/2%$
$5/2$% of principal = Rs.1250
Principal = Rs.${1250 × 2 × 100}/5$ = Rs.50000
Question : 12 [SSC CHSL 2014]
A sum of Rs. 800 amounts to Rs.920 in 3 years at the simple interest rate. If the rate is increased by 3% p.a., what will be the sum amount to in the same period ?
a) Rs.962
b) Rs.992
c) Rs.982
d) Rs.942
Answer »Answer: (b)
Using Rule 1,
Case I,
S.I. = 920 - 800 = Rs.120
Rate = ${\text"S.I." × 100}/\text" Principal × Time"$
= ${120 × 100}/{800 × 3}$ = 5% per annum
Case II,
Rate = 8% per annum
S.I. = ${800 × 8 × 3}/100$ = Rs.192
Amount = Principal + S.I.
= (800 + 192) = Rs.992
Question : 13 [SSC CPO S.I.2009]
A sum was invested on simple interest at a certain rate for 2 years. Had it been put at 3% higher rate, it would have fetched Rs.72 more. The sum is
a) Rs.1,500
b) Rs.1,200
c) Rs.1,800
d) Rs.1,600
Answer »Answer: (b)
Let the sum = P and original rate = R% per annum.
Then, ${P × (R + 3) × 2}/100 - {P × R × 2}/100 = 72$
${P × 3 × 2}/100 = 72$
P = ${72 × 100}/{3 × 2}$ = Rs.1200
Using Rule 13The difference between the S.I. for a certain sum $P_1$ deposited for time $T_1$ at $R_1$ rate of interest and another sum $P_2$ deposited for time $T_2$ at $R_2$ rate of interest isS.I. = ${P_2R_2T_2 - P_1R_1T_1}/100$
$P_1 = P, R_1 = R, T_1$ = 2
$P_2 = P, R_2 = R + 3, T_2$ = 2
S.I.= 72
72 = ${P × (R + 3) × 2 - P × R × 2}/100$
7200 = 6P
P = Rs.1200
Question : 14 [SSC CHSL 2012]
A person who pays income tax at the rate of 4 paise per rupee, find that a fall of interest rate from 4% to 3.75% diminishes his net yearly income by Rs.48. What is his capital ?
a) Rs.25,000
b) Rs.24,000
c) Rs.18,000
d) Rs.20,000
Answer »Answer: (d)
If the capital after tax deduction be x, then
x × (4 - 3.75) % = 48
${x × 0.25}/100$ = 48
${x × 25}/10000$ = 48
$x/400$ = 48
x = 48 × 400 = Rs.19200
Required capital
= ${19200 × 100}/96$ = Rs.20000
IMPORTANT quantitative aptitude EXERCISES
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Top 999+ Basic Simple Interest MCQ for BANK SSC UPSC Exam »
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New 899+ Simple Interest Questions For BANK & IBPS Exams »
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Top 799+ Simple Interest Aptitude Questions Answers Test »
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Top 999+ Aptitude Simple Interest MCQ: SSC Practice Test »
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New 750+ Simple Interest MCQ with Ratios For All BANK SSC »
type 2 increase or decrease in interest rate Shortcuts »
Click to Read...type 2 increase or decrease in interest rate Online Quiz
Click to Start..simple interest Shortcuts and Techniques with Examples
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type 1 basic simple interest using formula
Defination & Shortcuts … -
type 2 increase or decrease in interest rate
Defination & Shortcuts … -
type 3 money multiples in ‘n’ years
Defination & Shortcuts … -
type 4 difference & equality of si rate & years
Defination & Shortcuts … -
type 5 si on ‘n’ years & ‘x/y ‘of sum
Defination & Shortcuts … -
type 6 si with ratios
Defination & Shortcuts …
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