[B].
[C].
[D].
Answer: Option C
Explanation:
45 = 5 x 9, where 5 and 9 are co-primes.
Unit digit must be 0 or 5 and sum of digits must be divisible by 9.
Among given numbers, such number is 202860.
[B].
[C].
[D].
Answer: Option C
Explanation:
The pattern is 12, 22, 32, 42, 52, 62, 72. But, instead of 52, it is 20 which to be turned out.
[B].
[C].
[D].
Answer: Option C
Explanation:
| Speed in still water = | 1 | (11 + 5) kmph = 8 kmph. |
| 2 |
Video Explanation: https://youtu.be/KQX_mA3tcVA
[B].
[C].
[D].
Answer: Option C
Explanation:
‘LOGARITHMS’ contains 10 different letters.
| Required number of words | = Number of arrangements of 10 letters, taking 4 at a time. |
| = 10P4 | |
| = (10 x 9 x 8 x 7) | |
| = 5040. |
[B].
[C].
[D].
Answer: Option A
Explanation:
4 | x z = 6 x 1 + 4 = 10
———–
5 | y -2 y = 5 x z + 3 = 5 x 10 + 3 = 53
———–
6 | z – 3 x = 4 x y + 2 = 4 x 53 + 2 = 214
———–
| 1 – 4
Hence, required number = 214.
[B].
| 111 | 1 | m |
| 9 |
[C].
[D].
Answer: Option A
Explanation:
| When B runs 25 m, A runs | 45 | m. |
| 2 |
| When B runs 1000 m, A runs | 45 | x | 1 | x 1000 | m | = 900 m. | |
| 2 | 25 |
B beats A by 100 m.
[B].
[C].
[D].
Answer: Option A
Explanation:
Let AB be the tree and AC be its shadow.
Let ACB = .
| Then, | AC | = | 3 cot = 3 |
| AB |
= 30°.