[B].
[C].
[D].
Answer: Option A
Explanation:
Numbers are all primes. The next prime is 43.
[B].
[C].
[D].
Answer: Option C
Explanation:
Unit digit in 7105 = Unit digit in [ (74)26 x 7 ]
But, unit digit in (74)26 = 1
Unit digit in 7105 = (1 x 7) = 7
[B].
[C].
[D].
Answer: Option C
Explanation:
| Whole work is done by A in | 20 x | 5 | = 25 days. | ||
| 4 |
| Now, | 1 – | 4 | i.e., | 1 | work is done by A and B in 3 days. | ||
| 5 | 5 |
Whole work will be done by A and B in (3 x 5) = 15 days.
| A’s 1 day’s work = | 1 | , (A + B)’s 1 day’s work = | 1 | . |
| 25 | 15 |
| B’s 1 day’s work = | 1 | – | 1 | = | 4 | = | 2 | . | ||
| 15 | 25 | 150 | 75 |
| So, B alone would do the work in | 75 | = 37 | 1 | days. |
| 2 | 2 |
[B].
[C].
[D].
Answer: Option C
Explanation:
| Amount |
|
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|
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| = Rs. 35123.20 |
C.I. = Rs. (35123.20 – 25000) = Rs. 10123.20
[B].
[C].
[D].
Answer: Option A
Explanation:
Each of the numbers except 28, is a multiple of 3.
A. 8% p.a.
B. 6% p.a.
C. 4% p.a.
D. 5% p.a.
E. None of these
Explanation:
Let the rate of interest be R% p.a.
17400[1 + R/100]2 = 17400 + 1783.50
[1 + R/100]2 = (17400 + 1783.50)/17400
= 1 + 1025/10000 = 1 + 41/400
= 441/400 = [21/20]2
[1 + R/100] = 21/20
R/100 = 1/20
Therefore R = 5
[B].
[C].
[D].
Answer: Option B
Explanation:
| Relative speed = | = (45 + 30) km/hr | |||||||
|
||||||||
|
We have to find the time taken by the slower train to pass the DRIVER of the faster train and not the complete train.
So, distance covered = Length of the slower train.
Therefore, Distance covered = 500 m.
| Required time = | 500 x | 6 | = 24 sec. | ||
| 125 |