Model 1 Simplification using VBODMAS Practice Questions Answers Test with Solutions & More Shortcuts
simplification PRACTICE TEST [4 - EXERCISES]
Model 1 Simplification using VBODMAS
Model 2 Simplification based on square & square root
Model 3 Simplification based on cube & cube root
Model 4 Simplification with continued fraction
Question : 11
The simplification of $3.\ov{36} - 2.\ov{05} +1.\ov{33}$ equals :
a) 2.$\ov{64}$
b) 2.60
c) 2.64
d) 2.$\ov{61}$
Answer »Answer: (a)
Question : 12 [SSC CPO S.I.2003]
Simplify $[3{1/4} ÷ (1{1/4} - 1/2(2{1/2} - \ov{1/4 - 1/6}))] ÷ (1/2 of 4{1/3})$
a) 78
b) 18
c) 39
d) 36
Answer »Answer: (d)
$[3{1/4} ÷ (1{1/4} - 1/2(2{1/2} - \ov{1/4 - 1/6}))] ÷ (1/2 of 4{1/3})$
Using Rule 1,
= $[{13/4} ÷ ({5/4} - 1/2({5/2} - {3 - 2}/12))] ÷ {13/6}$
= $[{13/4} ÷ ({5/4} - 1/2({5/2} - 1/12))] ÷ {13/6}$
= $[{13/4} ÷ ({5/4} - 1/2({30 - 1}/12))] ÷ {13/6}$
= $[{13/4} ÷ ({5/4} - 1/2 × 29/12)] ÷ {13/6}$
= $[{13/4} ÷ ({30 - 29}/24)] ÷ {13/6}$
= $[{13/4} ÷ {1/24}] ÷ {13/6}$
$[{13/4} × 24] ÷ {13/6}$
= $13 × 6 × 6/13 = 36$
Question : 13
The value of $5/{1{7/8} of 1{1/3}} × {2{1/10}}/{3{1/2}} of 1{1/4}$
a) 2
b) $1{1/2}$
c) 1
d) 0.05
Answer »Answer: (b)
Using Rule 1,
$5/{15/8 × 4/3} × {21/10}/{7/2} of {5/4}$
=$5 × 2/5 × 21/10 × 2/7 × 5/4$
=$3/2 = 1{1}/2$
Question : 14 [SSC CPO S.I.2003]
${3{1/4} - 4/5 of {5/6}}/{4{1/3} ÷ {1/5} - (3/10 + 21{1/5})} - (1{2/3} of 1{1/2})$ is equal to
a) 15$1/2$
b) 9
c) 13
d) 11$1/2$
Answer »Answer: (c)
${3{1/4} - 4/5 of {5/6}}/{4{1/3} ÷ {1/5} - (3/10 + 21{1/5})} - (1{2/3} of 1{1/2})$
Using Rule 1,
= ${{13/4} - {5/6} × {4/5}}/{{13/3} ÷ {1/5} - (3/10 + {106/5})} - ({3/2} × {5/3})$
= ${13/4 - 2/3}/{{13 × 5}/3 - ({3+212}/10)} - 5/2$
= ${{39 - 8}/12}/{{65/3} - {215/10}} - 5/2$
= ${31/12}/{{650 - 645}/30} - 5/2$
= $31/12 × 30/5 - 5/2$
= $31/2 - 5/2 = {31 - 5}/2 = 26/2 = 13$
Question : 15
The simplified value of ${{1/3} ÷ {1/3} × {1/3}}/{{1/3} ÷ {1/3} of {1/3}} - 1/9$ is
a) $1/9$
b) 0
c) $1/3$
d) 1
Answer »Answer: (b)
Using Rule 1,
The given expression
${{1/3} ÷ {1/3} × {1/3}}/{{1/3} ÷ {1/3} of {1/3}} - 1/9$
${{1/3} × 3 × {1/3}}/{{1/3} ÷ ({1/3}×{1/3})} - 1/9$
= ${1/3}/{{1/3} ÷ {1/9}} - 1/9 = {1/3}/{1/3 × 9} - 1/9$
= ${1/3}/3 - 1/9 = 1/9 - 1/9 = 0$
IMPORTANT quantitative aptitude EXERCISES
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