Official Quant thread for CAT 2013

MBA CAT 2024
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Q: Water running in a cylindrical pipe of inner diameter 7 cm is collected in a container@ 192.5 liters/min.find the rate of flow of water. use pi=22/7.
26070
@albiesriram said:
C) only III is correct?
26071
@viewpt said:
Q: Water running in a cylindrical pipe of inner diameter 7 cm is collected in a container@ 192.5 liters/min.find the rate of flow of water. use pi=22/7.
is it 3 km/hr
26072
@shattereddream said:
is it 3 km/hr
Little more? 3.3ish?

Edit. 3 only. Forgot to divide 11 somehow.

regards
scrabbler
26073
@viewpt said:
C) only III is correct?
i think they have mistyped the option and the B option should be I and III are correct instead of incorrect. OA , B
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@albiesriram said:
i think they have mistyped the option and the B option should be I and III are correct instead of incorrect. OA , B
ya i too thought that only..but as per the options OA) C should be the ans.
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26076
@scrabbler said:
Little more? 3.3ish?Edit. 3 only. Forgot to divide 11 somehow.regardsscrabbler
ye likh kar kata kaisey..mujhe bhi btao..

Q: A person starts multiplying consecutive positive integers from 20. How many numbers should he multiply before the will have result that will end with 3 zeroes?
26077
@albiesriram said:
OA ) A,B, C
26078
@albiesriram said:
A?
26079
@viewpt said:
ye likh kar kata kaisey..mujhe bhi btao..Q: A person starts multiplying consecutive positive integers from 20. How many numbers should he multiply before the will have result that will end with 3 zeroes?
20 till 25

need three 5's
26080
@viewpt said:
OA ) 1
@KhannaiiM said:
A?
Mark all the correct options
26081
@albiesriram said:
option A,B and C??
26082
@albiesriram said:
Mark all the correct options
edited now you chk, is it A ,B, C
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@viewpt said:
edited now you chk, is it A , C
B as well
26084

@Narci

Can you tell the approach ?

26085
@heylady
@pheonix2013 said:
@heylady@ananyboss 16
Can you tell the approach ?
26086
@ananyboss said:
@NarciCan you tell the approach ?
for which question ?
26087
@ananyboss said:
Q If in any decreasing arithmetic progression, Sum of all its terms except first term equals -36. Sum of all terms except last term equals Zero. Difference between 10th and 6th term equals -16. What will be the first term of this series ???Ans ??????
a1, a2, ....., an

____a2 + a3 + ...+a(n-1) + an = -36
a1 + a2..............+a(n-1)_____= 0

=> a1 + -36 - an = 0

=> a1 - an = 36

Also, a1 + 9d - a1 - 5d = -16 = 4d
=> d = -4

=> a1 - a1 - (n-1)(-4) = 36
=> n = 10
OR a1 + a1 + d +....a1 + 8d = 0
9*a1 + 36*(-4) = 0

a1 = 16 ..