Official Quant thread for CAT 2013

MBA CAT 2024
30129
30130
@albiesriram said:
On reversing a three-digit number, we get a larger number. After adding them together, the result obtained is not a palindrome. The process is repeated with the new number obtained. We get a three-digit number, which is not a palindrome at the end of the 1st or 2nd repetition. At the end of the 3rd repetition, we get a four-digit palindrome. What is the difference between the initial three-digit number and its reverse?1. 99 2. 100 3. 165 4. 101
99 ??

diff. should be a multiple of 99
30131
@AsihekAdhvaryu how could u conclude it is a right triangle??

30132
30133
A can complete a piece of work in 4 days. B takes double the time taken by A. C takes double that of B, and D takes double that of C to complete the same task. They are paired in groups of two each. One pair takes two- thirds the time needed by the second pair to complete the work. Which is the first pair?
1. A, B 2. A, C 3. B, C 4. A, D
30134
A can complete a piece of work in 4 days. B takes double the time taken by A. C takes double that of B, and D takes double that of C to complete the same task. They are paired in groups of two each. One pair takes two- thirds the time needed by the second pair to complete the work. Which is the first pair?
1. A, B 2. A, C 3. B, C 4. A, D
30135
A can complete a piece of work in 4 days. B takes double the time taken by A. C takes double that of B, and D takes
double that of C to complete the same task. They are paired in groups of two each. One pair takes two- thirds the time
needed by the second pair to complete the work. Which is the first pair?
1. A, B 2. A, C 3. B, C 4. A, D
30136
@Estallar12 99..?
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30138

please solve it

30139
@albiesriram said:
The number of divisors of an odd number is 34. If it is multiplied by 12, the number of divisors will be1. 278 2. 76 3. 204 4. 216
204 ?

34 = 17*2

N = a^16*b^1*12 = a^16*b^1*3^1*2^2
no of divisors = 17*2*2*3 = 204
30140

please solve it

30141
@albiesriram said:
The number of divisors of an odd number is 34. If it is multiplied by 12, the number of divisors will be1. 278 2. 76 3. 204 4. 216
204 ?

N = a^16*b^1*12 = a^16*b^1*3*2^2
no. of divisors = 17*2*2*3 = 204
30142
A rhino needs to wear socks and shoes in its 4 legs and the socks should be wore before wearing shoes. Number of combinations possible? Given: 4 socks of Red blue green and white and 4 shoes of same color as socks and shoes are to be wore in corresponding color socks..ex: Red shoes and red socks.
30143
@albiesriram said:
On reversing a three-digit number, we get a larger number. After adding them together, the result obtained is not a palindrome. The process is repeated with the new number obtained. We get a three-digit number, which is not a palindrome at the end of the 1st or 2nd repetition. At the end of the 3rd repetition, we get a four-digit palindrome. What is the difference between the initial three-digit number and its reverse?1. 99 2. 100 3. 165 4. 101
option 1)
30144
@zuloo said:
palindrome kya hota hai dude? kindly let me know.
option 1) difference divisible by 9 imo.
30145
@albiesriram said:
On reversing a three-digit number, we get a larger number. After adding them together, the result obtained is not a palindrome. The process is repeated with the new number obtained. We get a three-digit number, which is not a palindrome at the end of the 1st or 2nd repetition. At the end of the 3rd repetition, we get a four-digit palindrome. What is the difference between the initial three-digit number and its reverse?1. 99 2. 100 3. 165 4. 101
option 1) difference divisible by 9 imo.
30146
A can complete a piece of work in 4 days. B takes double the time taken by A. C takes double that of B, and D takes
double that of C to complete the same task. They are paired in groups of two each. One pair takes two- thirds the time
needed by the second pair to complete the work. Which is the first pair?
1. A, B 2. A, C 3. B, C 4. A, D
30147

@albiesriram said:
A can complete a piece of work in 4 days. B takes double the time taken by A. C takes double that of B, and D takesdouble that of C to complete the same task. They are paired in groups of two each. One pair takes two- thirds the timeneeded by the second pair to complete the work. Which is the first pair?1. A, B 2. A, C 3. B, C 4. A, D
4 a,d
30148
@albiesriram said:
A can complete a piece of work in 4 days. B takes double the time taken by A. C takes double that of B, and D takesdouble that of C to complete the same task. They are paired in groups of two each. One pair takes two- thirds the timeneeded by the second pair to complete the work. Which is the first pair?1. A, B 2. A, C 3. B, C 4. A, D
It's BC