[B].
[C].
[D].
Answer: Option B
Explanation:
4 x 162 = 648. Sum of decimal places = 6.
So, 0.04 x 0.0162 = 0.000648 = 6.48 x 10-4
[B].
[C].
[D].
Answer: Option B
Explanation:
3-digit number divisible by 6 are: 102, 108, 114,… , 996
This is an A.P. in which a = 102, d = 6 and l = 996
Let the number of terms be n. Then tn = 996.
a + (n – 1)d = 996
102 + (n – 1) x 6 = 996
6 x (n – 1) = 894
(n – 1) = 149
n = 150
Number of terms = 150.
[B].
[C].
[D].
Answer: Option D
Explanation:
| Given Exp. | = a2 + b2 – 2ab, where a = 287 and b = 269 |
| = (a – b)2 = (287 – 269)2 | |
| = (182) | |
| = 324 |
[B].
[C].
[D].
Answer: Option D
Explanation:
| Speed = | 60 x | 5 | m/sec | = | 50 | m/sec. | ||
| 18 | 3 |
Length of the train = (Speed x Time).
| Length of the train = | 50 | x 9 | m = 150 m. | |
| 3 |
Video Explanation: https://youtu.be/q6Xy5JXNp-k
| 3 |
| 4 |
[B].
| 4 |
| 7 |
[C].
| 1 |
| 8 |
[D].
| 3 |
| 7 |
Answer: Option B
Explanation:
Let number of balls = (6 + 8) = 14.
Number of white balls = 8.
| P (drawing a white ball) = | 8 | = | 4 | . |
| 14 | 7 |
[B].
[C].
[D].
Answer: Option D
Explanation:
Since the month begins with a Sunday, to there will be five Sundays in the month.
| Required average |
|
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|
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| = 285 |
[B].
[C].
[D].
Answer: Option B
Explanation:
| Speed of the train relative to man | = (63 – 3) km/hr | |||||||
| = 60 km/hr | ||||||||
|
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|
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| Time taken to pass the man |
|
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| = 30 sec. |