[B].
[C].
[D].
Answer: Option A
Explanation:
The numbers are squares of odd natural numbers, starting from 5 up to 15.
So, 36 is wrong.
[B].
[C].
[D].
Answer: Option A
Explanation:
| 72519 x 9999 | = 72519 x (10000 – 1) |
| = 72519 x 10000 – 72519 x 1 | |
| = 725190000 – 72519 | |
| = 725117481. |
[B].
[C].
[D].
Answer: Option E
Explanation:
2nd term = (1st term) x 1 + 1 = 15 x 1 + 1 = 16.
3rd term = (2nd term) x 2 + 2 = 16 x 2 + 2 = 34.
4th term = (3th term) x 3 + 3 = 34 x 3 + 3 = 105.
5th term = (4th term) x 4 + 4 = 105 x 4 + 4 = 424
6th term = (5th term) x 5 + 5 = 424 x 5 + 5 = 2125
6th term should 2125 instead of 2124.
[B].
[C].
[D].
Answer: Option C
Explanation:
Angle traced by hour hand in 12 hrs. = 360°.
| Angle traced by it in | 11 | hrs = | 360 | x | 11 | ° | = 110°. | ||
| 3 | 12 | 3 |
Angle traced by minute hand in 60 min. = 360°.
| Angle traced by it in 40 min. = | 360 | x 40 | ° | = 240°. | ||
| 60 |
Required angle (240 – 110)° = 130°.
[B].
[C].
[D].
Answer: Option B
Explanation:
| Dividend on Rs. 20 = Rs. | 9 | x 20 | = Rs. | 9 | . | ||
| 100 | 5 |
Rs. 12 is an income on Rs. 100.
| Rs. | 9 | is an income on Rs. | 100 | x | 9 | = Rs. 15. | ||
| 5 | 12 | 5 |
[B].
[C].
[D].
Answer: Option C
Explanation:
In 12 hours, they are at right angles 22 times.
In 24 hours, they are at right angles 44 times.
[B].
[C].
[D].
Answer: Option D
Explanation:
Let the number be x and on dividing x by 5, we get k as quotient and 3 as remainder.
x = 5k + 3
x2 = (5k + 3)2
= (25k2 + 30k + 9)
= 5(5k2 + 6k + 1) + 4
On dividing x2 by 5, we get 4 as remainder.