Discussion
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- Question
Evaluate : (2.39)2 - (1.61)2 2.39 - 1.61
Options- A. 2
- B. 4
- C. 6
- D. 8
- Correct Answer
- 4
ExplanationGiven Expression = a2 - b2 = (a + b)(a - b) = (a + b) = (2.39 + 1.61) = 4. a - b (a - b) - 1. How many digits will be there to the right of the decimal point in the product of 95.75 and .02554?
Options- A. 5
- B. 6
- C. 7
- D. None of these Discuss
- 2. Which of the following is equal to 3.14 x 106?
Options- A. 314
- B. 3140
- C. 3140000
- D. None of these Discuss
- 3.
The value of (0.96)3 - (0.1)3 is: (0.96)2 + 0.096 + (0.1)2
Options- A. 0.86
- B. 0.95
- C. 0.97
- D. 1.06 Discuss
- 4. 4.036 divided by 0.04 gives :
Options- A. 1.009
- B. 10.09
- C. 100.9
- D. None of these Discuss
- 5. What is the sum of two consecutive even numbers, the difference of whose squares is 84?
Options- A. 34
- B. 38
- C. 42
- D. 46 Discuss
- 6. 3889 + 12.952 -? = 3854.002
Options- A. 47.095
- B. 47.752
- C. 47.932
- D. 47.95 Discuss
- 7.
5 x 1.6 - 2 x 1.4 =? 1.3
Options- A. 0.4
- B. 1.2
- C. 1.4
- D. 4 Discuss
- 8.
The value of 489.1375 x 0.0483 x 1.956 is closest to: 0.0873 x 92.581 x 99.749
Options- A. 0.006
- B. 0.06
- C. 0.6
- D. 6 Discuss
- 9. The expression (11.98 x 11.98 + 11.98 x x + 0.02 x 0.02) will be a perfect square for x equal to:
Options- A. 0.02
- B. 0.2
- C. 0.04
- D. 0.4 Discuss
- 10. When 0.232323..... is converted into a fraction, then the result is:
Options- A.
1 5 - B.
2 9 - C.
23 99 - D.
23 100
Discuss
Decimal Fraction problems
Search Results
Correct Answer: 6
Explanation:
Sum of decimal places = 7.
Since the last digit to the extreme right will be zero (since 5 x 4 = 20), so there will be 6 significant digits to the right of the decimal point.
Correct Answer: 3140000
Explanation:
3.14 x 106 = 3.14 x 1000000 = 3140000.
Correct Answer: 0.86
Explanation:
| Given expression |
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Correct Answer: 100.9
Explanation:
| 4.036 | = | 403.6 | = 100.9 |
| 0.04 | 4 |
Correct Answer: 42
Explanation:
Let the numbers be x and x + 2.
Then, (x + 2)2 - x2 = 84
⟹ 4x + 4 = 84
⟹ 4x = 80
⟹ x = 20.
∴ The required sum = x + (x + 2) = 2x + 2 = 42.
Correct Answer: 47.95
Explanation:
Let 3889 + 12.952 - x = 3854.002.
Then x = (3889 + 12.952) - 3854.002
= 3901.952 - 3854.002
= 47.95.
Correct Answer: 4
Explanation:
| Given Expression = | 8 - 2.8 | = | 5.2 | = | 52 | = 4. |
| 1.3 | 1.3 | 13 |
Correct Answer: 0.06
Explanation:
| 489.1375 x 0.0483 x 1.956 | ≈ | 489 x 0.05 x 2 |
| 0.0873 x 92.581 x 99.749 | 0.09 x 93 x 100 |
| = | 489 |
| 9 x 93 x 10 |
| = | 163 | x | 1 |
| 279 | 10 |
| = | 0.58 |
| 10 |
= 0.058 ≈ 0.06.
Correct Answer: 0.04
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
Correct Answer:
| 23 |
| 99 |
Explanation:
| 0.232323... = 0.23 = | 23 |
| 99 |
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