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Recently Resolved Doubts

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T
Taruni
25 Aug 2026

Resolved in 1m

Question:

AB and CD are 2 parallel chords of a circle which has a radius of 10 units. Parallel chords are 14 units apart such that one of the chords has a length of 12 units. What is the length of non-parallel side of trapezium ABCD

A

$$10\sqrt{2}$$

B

$$15\sqrt{6}$$

C

$$6\sqrt{5}$$

D

20

Doubt

How do i know if the trapezium is isosceles. since it is given in the question as the length of the non-parallel "side" are we assuming it to be a isosceles trapzium.


CR7
25 Aug 2026

Resolved in 1m

Question:

The exact time after 12:00 noon :after which the minute hand and the hour hand are exactly opposite to each other for the second time is?

A

1: 36$$\frac{4}{11}$$ P.M.

B

1: 38$$\frac{4}{11}$$ P.M.

C

1: 36$$\frac{2}{11}$$ P.M.

D

1: 38$$\frac{2}{11}$$ P.M.

Doubt

How did you go from 98 2/11 to 38 2/11?


S
Somnath
25 Aug 2026

Resolved in 1m

Question:

Who among the friends is truthteller?

A

Bablu

B

Reena

C

Veena

D

Cannot be determined

Doubt

veena first statement that price of all car is prime individually or together
but taken together its not prime
then why this statement is taken as true


Z
Zain
25 Aug 2026

Resolved in 1m

Question:

The exact time after 12:00 noon :after which the minute hand and the hour hand are exactly opposite to each other for the second time is?

A

1: 36$$\frac{4}{11}$$ P.M.

B

1: 38$$\frac{4}{11}$$ P.M.

C

1: 36$$\frac{2}{11}$$ P.M.

D

1: 38$$\frac{2}{11}$$ P.M.

Doubt

Hello Team,
I used the approach in which i considered
x = no. of minutes till the angle is 180
so 6x - x/2 = 180
on solving we get x = 360/11
now when i solved further for the minute hand to go from this back to 1 PM, 355/11 minutes would have elapsed and further 360/11 to get the second 180 degree, so the total comes to 1075/11 which gives me a different answer, can i please know where i went wrong


A
Aparna
25 Aug 2026

Resolved in 1m

Question:

Who among the friends is truthteller?

A

Bablu

B

Reena

C

Veena

D

Cannot be determined

Doubt

in 1st statement of Babila we know that it is false can't be second part also false that she doesnt have a 23 lakh car which means that her car is priced at 37 lakhs, we have only considered first half that she doesn't have a red car but haven't assumed for the second half that price also cannot be 23? pls explain the fallacy in my reasoning.


A
Aayush
25 Aug 2026

Resolved in 1m

This is a doubt from Quant Sectional Test 1. Please attempt the mock here.
Doubt

understood the solution but how do we reach till the point to classify that the numbers are close to the cube and + n like there can be many more things that can make the numbers odd one out may be not in this question but in others so it there any rule book or its all hit and trail..

S
Sanyam
25 Aug 2026

Resolved in 1m

Question:

Who among the friends owns the cheapest car?

A

Reena

B

Babila

C

Veena

D

Cannot be determined

Doubt

at 15:45, it is claimed that Babila's statement "Sum of the price of my car and Veena's car is not 76 lakh." is false, which actually means the sum of Babila and Veena's car IS 76 lakh, effectively making Babila's cost be 23 lakh


Z
Zain
24 Aug 2026

Resolved in 1m

Question:

Ramu has 8 solutions of alcohol and water. The concentration  of the solutions is 74%, 80%, 84%, 75%, 81%, 56%, 65%, 82%. He wants to select three solutions to form a mixture such that at least one of the solutions has alcohol concentration greater than 80%. The number of ways it can be done is


Correct Answer: 46

Doubt

Hello Team,
I understood where i went wrong with the approach of,
He choosing one out of 81%, 82% and 84%
and then selecting the rest 2 in 7C2 ways,
because some cases will be repeated. What my question is, if one was to solve using this method where the answer they get it 63, how would one go about enumerating the cases which need to be removed from 63 in order to get to the final answer of 46.
I do get that this is a very inefficient approach but I still wanna learn it if possible.
Thank You, Regards.


S
Shakir
25 Aug 2026

Resolved in 1m

Question:

P, Q, R and S are positive integers. R is 300% of the sum of P and S. P:Q:R is 4:25:23. If Q:S= a:b, where a and b are co-prime numbers, find the value of (a+b).

A

64

B

75

C

 72

D

86

E

89

Doubt

Please explain the solution for this question


U
Utkarsh
25 Aug 2026

Resolved in 1m

This is a doubt from DashCAT Mock 2. Please attempt the mock here.
Doubt

how do we come to think that we need to calculate X+2Y+3Z ??

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