Aptitude - Decimal Fraction
1.
What decimal of an hour is a second ?
Answer
Required decimal = 160 x 60 = 13600 = .00027
Answer :
Option CExplanation :
Required decimal = 160 x 60 = 13600 = .00027
2.
0.04 x 0.0162 is equal to :
Answer
4 x 162 = 648. Sum of decimal places = 6.
So, 0.04 x 0.0162 = 0.000648 = 6.48 x 10−4
Answer :
Option BExplanation :
4 x 162 = 648. Sum of decimal places = 6.
So, 0.04 x 0.0162 = 0.000648 = 6.48 x 10−4
4.
Evaluate (2.39)2 − (1.61)2 2.39 − 1.61
Answer
Given expression = (a)2 − (b)2 a − b = (a + b)(a − b) (a − b) = (a + b)
= (2.39 + 1.61) = 4
Answer :
Option BExplanation :
Given expression = (a)2 − (b)2 a − b = (a + b)(a − b) (a − b) = (a + b)
= (2.39 + 1.61) = 4
5.
4.036 divided by 0.04 gives :
Answer
4.036 0.04 = 403.6 4 = 100.9
Answer :
Option CExplanation :
4.036 0.04 = 403.6 4 = 100.9
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