This set of Aptitude Questions and Answers (MCQs) focuses on “Operations”.
1. Find the value of 2.22 + 22.222 + 222.2222.
a) 246.6642
b) 246.4642
c) 244.6642
d) 242.4644
View Answer
Explanation: 2.22 + 22.222 + 222.2222 = 246.6642.
2. Find the value of 2.2 + 5.82 + 0.253.
a) 8.3040
b) 8.304
c) 8.304
d) 8.304
View Answer
Explanation: 2.2 + 5.82 + 0.253 = \(\Big(2+ \frac{2}{9} \Big)+\Big(5+ \frac{82}{99} \Big)+\frac{253-2}{990}=\frac{8221}{990}\)=8.3040404…=8.304.
3. Find the value of 5.07 + 0.987 – 2.598.
a) 6.664251
b) 8.664154
c) 3.466956
d) 2.536896
View Answer
Explanation: 5.07 + 0.987 – 2.598 = \(\Big(5+\frac{07-0}{90}\Big)+\frac{987-98}{900}-\Big(2+\frac{598}{999}\Big) = \frac{457}{90}+\frac{889}{900}-\frac{2596}{999}\)=3.466956957…= 3.466956.
4. Find the product of (8*0.8*0.08*80*800*0.008*1.1).
a) 288.3584
b) 360.448
c) 291.27111
d) 242.7259259…
View Answer
Explanation: 8*0.8*0.08*80*800*0.008*1.1 = 8*8*10-1*8*10-2*8*10*8*102*8*10-3*11*10-1=288.3584.
5. What is the value of \(\frac{22}{5}+\frac{0.23}{23}-\frac{1.68}{0.56}*\frac{1.68}{2.1}\)?
a) 2.101
b) 2.11
c) 2.201
d) 2.01
View Answer
Explanation: \(\frac{22}{5}+\frac{0.23}{23}-\frac{1.68}{0.56}*\frac{1.68}{2.1}\)=4.4+0.01-(3*0.8)=2.01.
6. Given that 2.81*14.2 =39.902, find the value of (562*426).
a) 239412
b) 294324
c) 254312
d) 246524
View Answer
Explanation: 562*426 = (281*2)*(142*3)=2.81*100*14.2*10*2*3=39.902*1000*6=239412.
7. Find the in value of A in 536.63 + 8967.532 + A = 9632.819.
a) 122.587
b) 125.667
c) 128.657
d) 124.637
View Answer
Explanation: 536.63 + 8967.532 + A = 9632.819
A = 9632.819 – (536.63 + 8967.532) = 128.657.
8. If \(\frac{3}{0.5369}\)=5.5876, then what is the value of \(\frac{1}{0.005369}\)?
a) 186.2544
b) 188.2565
c) 182.5634
d) 189.5682
View Answer
Explanation: \(\frac{3}{0.5369}\)=5.5876
\(\frac{1}{0.5369}=\frac{5.5876}{3}\)=1.862544.
\(\frac{1}{0.005369}\)=186.2544.
9. If \(\frac{a}{b}\)=0.45, then what is the value of \(\frac{3a-2b}{3a+2b}\)?
a) -0.19403
b) -0.09403
c) -0.11403
d) -0.15303
View Answer
Explanation: \(\frac{3a-2b}{3a+2b}=\frac{3 \frac{a}{b}-2}{3 \frac{a}{b}+2}=\frac{3*0.45-2}{3*0.45+2}\)=-0.19403.
10. The product of three decimal numbers are 7.986 and if the product of any two decimal number is 2.42, 3.63 and 7.26 respectively, then find the greatest among the three decimal numbers.
a) 3.4
b) 3.3
c) 2.3
d) 3.8
View Answer
Explanation: Given the product of three decimal numbers are 7.986 and if the product of any two decimal number is 2.42, 3.63 and 7.26 respectively.
To obtain the largest decimal number among the 3, we have to divide the product of three numbers by least product of two numbers.
\(\frac{7.986}{2.42}\)=3.3
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