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A farmer built a fence around his square plot. He used 27 fence poles on each side of the square. How many poles did he need altogether? |
| A) 100
B) 104
C) 108
D) 110
Correct Answer : 104 Explanation : Since each pole at the corner i.e. 4 corner ploes of the plot is common to its two sides, so we have : Total number of poles needed = 27 x 4 - 4 = 108 - 4 = 104. |
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If you write down all the numbers from 1 to 100, then how many times do you write 3? |
| A) 11
B) 18
C) 20
D) 21
Correct Answer : 20 Explanation : if write down from 1 to 100, there are eleven numbers with 3 as the unit's digit- 3, 13, 23, 33, 43, 53, 63, 73, 83, 93; 33 has two three, and nine numbers with 3 as the ten's digit - 30, 31, 32, 34, 35, 36, 37, 38, 39. So, required number = 11+ 9= 20. |
The total number of digits used in numbering the pages of a book having 366 pages is? |
| A) 732
B) 990
C) 1098
D) 1305
Correct Answer : 990 Explanation : Total number of digits= No. of digits in 1- digit page nos.(1 to 9) + No. of digits in 2-digit page nos.(10 to 99) + No. of digits in 3- digit page nos(100 to 999). First 9 pages having 1 digit nos (1x9=9 digits). So total will be = (1 x 9 + 2 x 90 + 3 x 267) = (9 + 180 + 801) = 990. |
In a garden, there are 10 rows and 12 coloumns of mango trees. The distance between two trees is 2 meters and a distance of one meter is left from all sides of the boundary of the garden. The length of the garden is? |
| A) 20m
B) 22m
C) 24m
D) 26m
Correct Answer : 24m Explanation : Between 12 mango trees, there are 11 gaps and each gap has 2 metre length. Also, 1metre is left from all sides of the boundary of the garden. Hence, length of the garden=11×2+1+1=24 meter |
Which of the following operations will result in 22? |
| A) 16 / 12 + 8 - 13 * 15
B) 16 - 12 * 8 / 13 + 15
C) 16 * 12 / 8 + 13 - 15
D) 16 + 12 - 8 * 13 / 15
Correct Answer : 16 * 12 / 8 + 13 - 15 Explanation : 16 * 12 / 8 + 13 - 15 |
If 6★5 = 31, 7★8 = 57, 3★4 = 13, then 9★10 = ? |
| A) 90
B) 91
C) 81
D) 19
Correct Answer : 91 Explanation : As, 6★5 = 6 * 5 + 1 = 31 |
If 879 = 8, 625 = 1 and 586 = 9 then, 785 = ? |
| A) 6
B) 7
C) 8
D) 9
Correct Answer : 6 Explanation : 879 => (7 + 9) - 8 = 8 |
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If given, 12 (169) 5, 4 (20) 2 and 1 (26) 5 then 7 (--) 3 ? |
| A) 78
B) 68
C) 58
D) 36
Correct Answer : 58 Explanation : As, 122 + 52 => 144 + 25 = 169 |
If 6 *8 *3 = 638, 9 *0 *2 = 920, then 5 *7 *4 =? |
| A) 574
B) 745
C) 475
D) 547
Correct Answer : 547 Explanation : As, 6 *8 *3 = 638 |