2880, 480, 92, 24, 8, 4, 4
Question: 2880, 480, 92, 24, 8, 4, 4
[A].
480
92
24
8
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
Go on dividing by 6, 5, 4, 3, 2, 1 respectively to obtain the next number.
Clearly, 92 is wrong.
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105, 85, 60, 30, 0, -45, -90
Question:
105, 85, 60, 30, 0, -45, -90
[A].0 [B].
85 [C].
-45 [D].
60 Answer: Option A
Explanation:
Subtract 20, 25, 30, 35, 40, 45 from successive numbers.
So, 0 is wrong.
46080, 3840, 384, 48, 24, 2, 1
Question: 46080, 3840, 384, 48, 24, 2, 1
[A].1 [B].
2 [C].
24 [D].
384 Answer: Option C
Explanation:
The terms are successively divided by 12, 10, 8, 6, …etc.
So, 24 is wrong, it should be 8 (48/6 = 8).
(935421 x 625) = ?
Question:
(935421 x 625) = ?
[A].575648125 [B].
584638125 [C].
584649125 [D].
585628125 Answer: Option B
Explanation:
935421 x 625 = 935421 x 54 = 935421 x 10 4 2 = 935421 x 104 = 9354210000 24 16 = 584638125
Which of the following is a prime number ?
Question:
Which of the following is a prime number ?
[A].33 [B].
81 [C].
93 [D].
97 Answer: Option D
Explanation:
Clearly, 97 is a prime number.
A man buys Rs. 20 shares paying 9% dividend. The man wants to have an interest of 12% on his money. The market value of each share is:
Question:
A man buys Rs. 20 shares paying 9% dividend. The man wants to have an interest of 12% on his money. The market value of each share is:
[A].Rs. 12 [B].
Rs. 15 [C].
Rs. 18 [D].
Rs. 21 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 David gets on the elevator at the 11th floor of a building and rides up at the rate of 57 floors per minute. At the same time, Albert gets on an elevator at the 51st floor of the same building and rides down at the rate of 63 floors per minute. If they continue travelling at these rates, then at which floor will their paths cross ?
Question:
David gets on the elevator at the 11th floor of a building and rides up at the rate of 57 floors per minute. At the same time, Albert gets on an elevator at the 51st floor of the same building and rides down at the rate of 63 floors per minute. If they continue travelling at these rates, then at which floor will their paths cross ?
[A].19 [B].
28 [C].
30 [D].
37 Answer: Option C
Explanation:
Suppose their paths cross after x minutes.
Then, 11 + 57x = 51 – 63x 120x = 40
x = 1 3 Number of floors covered by David in (1/3) min. = 1 x 57 = 19. 3 So, their paths cross at (11 +19) i.e., 30th floor.