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Arithmetic Aptitude :: Decimal Fraction
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Evaluate :(2.39)2−(1.61)22.39−1.61
Answer : Option B
Explanation :
Given Expression =a2−b2a−b=(a+b)(a−b)(a−b)=(a + b) = (2.39 + 1.61) = 4.
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What decimal of an hour is a second ?
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Answer : Option C
Explanation :
Required decimal =160∗60=13600= .00027
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The value of(0.96)3−(0.1)3(0.96)2+0.096+(0.1)2is:
Answer : Option A
Explanation :
Given expression=(0.96)3−(0.1)3(0.96)2+(0.96∗0.1)+(0.1)2
=[a3−b3a2+ab+b2]
=(a - b)
=(0.96-01)
=0.86
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The value of0.1∗0.1∗0.1+0.02∗0.02∗0.020.2∗0.2∗0.2+0.04∗0.04∗0.04is:
Answer : Option B
Explanation :
Given expression =(0.1)3+(0.02)323[(0.1)3+(0.02)3]=18=0.125
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If 2994 ÷ 14.5 = 172, then 29.94 ÷ 1.45 = ?
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Answer : Option C
Explanation :
= 29.941.45=299.414.5
=[299.414.5*110]
[ Here, Substitute 172 in the place of 2994/14.5 ]
=17210
=17.2
Answer : Option C
Explanation :
Let.009X=.01; Then x =.009.01=.91=.9
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The [removed]11.98 x 11.98 + 11.98 x x + 0.02 x 0.02) will be a perfect square for x equal to:
Answer : Option C
Explanation :
Given expression = (11.98)2 + (0.02)2 + 11.98 x x.
For the given expression to be a perfect square, we must have
11.98 x x = 2 x 11.98 x 0.02 or x = 0.04
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(0.1667)(0.8333)(0.3333)(0.2222)(0.6667)(0.1250)is approximately equal to
Answer : Option D
Explanation :
Given expression =(0.3333)(0.2222)x(0.1667)(0.8333)(0.6667)(0.1250)
=33332222x1/6∗5/62/3∗125/1000
=[32x16x56x32x8]
=52
=2.50
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When 0.232323..... is converted into a fraction, then the result is:
Answer : Option C
Explanation :
0.232323...=0.¯23=2399
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3889 + 12.952 - ? = 3854.002
Answer : Option D
Explanation :
Let 3889 + 12.952 - x = 3854.002.
Then x = (3889 + 12.952) - 3854.002
= 3901.952 - 3854.002
= 47.95.
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