Two new charity organizations C_{1} and C_{2} were formed, with x members each, on January 1, 2012. On first day of each, subsequent month, in C_{1}, number of members increases by a certain number a, while in C_{2}, number of members increases in such a way that ratio of the number of members in a month to the preceding month bear a ratio equal to b. On May 1, 2012, both organizations had the same number of members. If a = 20x, then b will be
A. | 2 |
B. | 3 |
C. | 2.5 |
D. | 3.5 |
Option: B Explanation :
Number of members in C_{1} on May 1, 2012 = x + 4ya Click on Discuss to view users comments. |
Which of the following is true?
A. | √2+√5=√7 |
B. | √2+√5 ≤ √7 |
C. | √2+√5<√7 |
D. | √2+√5 > √7 |
Option: D Explanation :
(√2+√5)² = 2 + 2√10 +5 =7+2√10 Click on Discuss to view users comments. |
What is the least number which on being divided by 5, 6, 8, 9, 12 leaves in each case a remainder 1 but when divided by 13 leaves no remainder?
A. | 2987 |
B. | 3601 |
C. | 3600 |
D. | 2986 |
Option: B Explanation :
L.C.M. of 5, 6, 8, 9 and 12 is 360 Click on Discuss to view users comments. |
Average marks of 15 students in a class is 145, maximum marks being 150. If two lowest scores are removed, the average increases by 5. Also, two lowest scores are consecutive multiples of 9. What is lowest score in the.class?
A. | 126 |
B. | 117 |
C. | 108 |
D. | None of these |
Option: C Explanation :
Total marks of 15 students = 15 x 145 = 2175. Click on Discuss to view users comments. |
A gardener had a number of shrubs to plant in horizontal rows. At first he tried to plant 5 shrubs in each row, then 6, then 8 and then 12, but had always 1 left. On trying 13, in one row he had none left. What is the smallest number of shrubs that he could have had?
A. | 481 |
B. | 477 |
C. | 468 |
D. | 121 |
Option: A Explanation :
Number is 120K + 1= ((13 * 9 + 3) K + 1) Click on Discuss to view users comments. |