Aptitude - Decimal Fraction
Exercise : Decimal Fraction - General Questions
- Decimal Fraction - Formulas
- Decimal Fraction - General Questions
11.
0.04 x 0.0162 is equal to:
Answer: Option
Explanation:
4 x 162 = 648. Sum of decimal places = 6.
So, 0.04 x 0.0162 = 0.000648 = 6.48 x 10-4
So, 0.04 x 0.0162 = 0.000648 = 6.48 x 10-4
12.
4.2 x 4.2 - 1.9 x 1.9 | is equal to: |
2.3 x 6.1 |
Answer: Option
Explanation:
Given Expression = | (a2 - b2) | = | (a2 - b2) | = 1. |
(a + b)(a - b) | (a2 - b2) |
13.
If | 144 | = | 14.4 | , then the value of x is: |
0.144 | x |
Answer: Option
Explanation:
144 | = | 14.4 |
0.144 | x |
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144 x 1000 | = | 14.4 |
144 | x |
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14.4 | = 0.0144 |
1000 |
14.
The price of commodity X increases by 40 paise every year, while the price of commodity Y increases by 15 paise every year. If in 2001, the price of commodity X was Rs. 4.20 and that of Y was Rs. 6.30, in which year commodity X will cost 40 paise more than the commodity Y ?
Answer: Option
Explanation:
Suppose commodity X will cost 40 paise more than Y after z years.
Then, (4.20 + 0.40z) - (6.30 + 0.15z) = 0.40
0.25z = 0.40 + 2.10
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2.50 | = | 250 | = 10. |
0.25 | 25 |
X will cost 40 paise more than Y 10 years after 2001 i.e., 2011.
15.
Which of the following are in descending order of their value ?
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