[B].
[C].
[D].
Answer: Option C
Explanation:
| Required decimal = | 1 | = | 1 | = .00027 |
| 60 x 60 | 3600 |
[B].
[C].
[D].
Answer: Option C
Explanation:
The word ‘LEADER’ contains 6 letters, namely 1L, 2E, 1A, 1D and 1R.
| Required number of ways = | 6! | = 360. |
| (1!)(2!)(1!)(1!)(1!) |
Video Explanation: https://youtu.be/2_2QukHfkYA
[B].
[C].
[D].
Answer: Option A
Explanation:
Let the average age of the whole team by x years.
11x – (26 + 29) = 9(x -1)
11x – 9x = 46
2x = 46
x = 23.
So, average age of the team is 23 years.
[B].
[C].
[D].
Answer: Option C
Explanation:
Go on dividing by 4 to get the next number.
So, 200 is wrong.
[B].
[C].
[D].
Answer: Option C
Explanation:
The pattern is 1 x 2, 2 x 3, 3 x 4, 4 x 5, 5 x 6, 6 x 7, 7 x 8.
So, the next number is 8 x 9 = 72.
[B].
[C].
[D].
Answer: Option B
Explanation:
Let the middle digit be x.
Then, 2x = 10 or x = 5. So, the number is either 253 or 352.
Since the number increases on reversing the digits, so the hundred’s digits is smaller than the unit’s digit.
Hence, required number = 253.
[B].
[C].
[D].
Answer: Option A
Explanation:
Let the numbers be a, b and c.
Then, a2 + b2 + c2 = 138 and (ab + bc + ca) = 131.
(a + b + c)2 = a2 + b2 + c2 + 2(ab + bc + ca) = 138 + 2 x 131 = 400.
(a + b + c) = 400 = 20.
Video Explanation: https://youtu.be/qmJ-0X8j_xQ