100+ TNPSC Simplification Previous Year Question Paper with Answers Pdf - 1
Question: 1
The smallest fraction which should be subtracted from the sum of $$1{3}/{4}$$, $$2{1}/{2}$$, $$5{7}/{12}$$, $$3{1}/{3}$$ and $$2{1}/{4}$$ to make the result a whole number is
(A) $${185}/{12}$$
(B) $${18}/{12}$$
(C) $${1}/{2}$$
(D) 7
Ans: A
Sum of given fractions = $${7}/{4} + {5}/{2} + {67}/{12} + {10}/{3} + {9}/{4}$$
= $$({21 + 30 + 67 + 40 + 27} / {12})$$ = $${185}/{12}$$
The whole number just less than $${185}/{12}$$ is 15.
Let $${185}/{12}$$ - x = 15. Then, x = $$({185}/{12} - 15)$$ = $${5}/{12}$$.
Question: 2
1260 ÷ 15 ÷ 7 = ?
(A) 10
(B) 12
(C) 58
(D) 122
Ans: B
Given expression = 1260 ÷ 15 ÷ 7= 84 ÷ 7 = 12.
Question: 3
$$(999{999}/{1000} × 7)$$ is equal to
(A) $$6633{7}/{1000}$$
(B) $$6993{7}/{1000}$$
(C) $$6999{993}/{1000}$$
(D) $$7000{7}/{1000}$$
Ans: C
Given expression = $$({1000} – 1/{1000})$$ × 7 = $$(7000 - {7}/{1000})$$ = $$6999{993}/{1000}$$.
Question: 4
$${18 × 14 - 6 × 8}/{488 ÷ 4 - 20}$$ = ?
(A) 1
(B) 2
(C) 3
(D) 4
Ans: B
Given expression = $${252 - 48} / {122 - 20}$$ = $${204}/{102}$$ = 2.
Question: 5
The value of 1 + $${1}/{4 × 3} + {1}/{4 × 3^2} + {1}/{4 × 3^3}$$ is
(A) $${3}/{2}$$
(B) $${121}/{108}$$
(C) $${31}/{2}$$
(D) $${40}/{2}$$
Ans: B
Given expression = $${4 × 3^2 + 3^2+ 3 + 1} / {4 × 3^3}$$ =$${108 + 9 + 3 + 1} / {108}$$ = $${121}/{108}$$.
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