Aptitude | Calendar

On 8th Dec, 2007 Saturday falls. What day of the week was it on 8th Dec, 2006?

Byadmin July 18, 2022

Question:
On 8th Dec, 2007 Saturday falls. What day of the week was it on 8th Dec, 2006?

[A].

Sunday

[B].

Thursday

[C].

Tuesday

[D].

Friday

Answer: Option D

Explanation:

The year 2006 is an ordinary year. So, it has 1 odd day.

So, the day on 8th Dec, 2007 will be 1 day beyond the day on 8th Dec, 2006.

But, 8th Dec, 2007 is Saturday.

8th Dec, 2006 is Friday.

Aptitude | Boats and Streams

A boat takes 90 minutes less to travel 36 miles downstream than to travel the same distance upstream. If the speed of the boat in still water is 10 mph, the speed of the stream is:

Question: A boat takes 90 minutes less to travel 36 miles downstream than to travel the same distance upstream. If the speed of the boat in still water is 10 mph, the speed of the stream is:
[A].

2 mph
[B].
2.5 mph
[C].
3 mph
[D].
4 mph

Answer: Option A

Explanation:

Let the speed of the stream x mph. Then,

Speed downstream = (10 + x) mph,

Speed upstream = (10 – x) mph.

36 – 36 = 90

(10 – x) (10 + x) 60

72x x 60 = 90 (100 – x2)

x2 + 48x – 100 = 0

(x+ 50)(x – 2) = 0

x = 2 mph.

Read More A boat takes 90 minutes less to travel 36 miles downstream than to travel the same distance upstream. If the speed of the boat in still water is 10 mph, the speed of the stream is:
Aptitude | Problems On Trains

A train moves past a telegraph post and a bridge 264 m long in 8 seconds and 20 seconds respectively. What is the speed of the train?

Question: A train moves past a telegraph post and a bridge 264 m long in 8 seconds and 20 seconds respectively. What is the speed of the train?
[A].

69.5 km/hr
[B].
70 km/hr
[C].
79 km/hr
[D].
79.2 km/hr

Answer: Option D

Explanation:

Let the length of the train be x metres and its speed by y m/sec.

Then, x = 8 x = 8y

y

Now, x + 264 = y

20

8y + 264 = 20y

y = 22.

Speed = 22 m/sec = 22 x 18 km/hr = 79.2 km/hr.

5

Read More A train moves past a telegraph post and a bridge 264 m long in 8 seconds and 20 seconds respectively. What is the speed of the train?
Aptitude | Percentage

Two numbers A and B are such that the sum of 5% of A and 4% of B is two-third of the sum of 6% of A and 8% of B. Find the ratio of A : B.

Question: Two numbers A and B are such that the sum of 5% of A and 4% of B is two-third of the sum of 6% of A and 8% of B. Find the ratio of A : B.
[A].

2 : 3
[B].
1 : 1
[C].
3 : 4
[D].
4 : 3

Answer: Option D

Explanation:

5% of A + 4% of B = 2 (6% of A + 8% of B)

3

5 A + 4 B = 2 6 A + 8 B

100 100 3 100 100

1 A + 1 B = 1 A + 4 B

20 25 25 75

1 – 1 A = 4 – 1 B

20 25 75 25

1 A = 1 B

100 75

A = 100 = 4 .

B 75 3

Required ratio = 4 : 3

Video Explanation: YouTube Video

Read More Two numbers A and B are such that the sum of 5% of A and 4% of B is two-third of the sum of 6% of A and 8% of B. Find the ratio of A : B.
Aptitude | Odd Man Out And Series

25, 36, 49, 81, 121, 169, 225

Question:
25, 36, 49, 81, 121, 169, 225

[A].

36
[B].
49
[C].
121
[D].
169

Answer: Option A

Explanation:

The numbers are squares of odd natural numbers, starting from 5 up to 15.

So, 36 is wrong.

Read More 25, 36, 49, 81, 121, 169, 225
Compound Interest | Mathematics Mcqs

The difference between compound interest and simple interest on an amount of Rs. 15,000 for 2 years is Rs. 96. What is the rate of interest per annum?

The difference between compound interest and simple interest on an amount of Rs. 15,000 for 2 years is Rs. 96. What is the rate of interest per annum?

A. 8
B. 10
C. 12
D. Cannot be determined

Read More The difference between compound interest and simple interest on an amount of Rs. 15,000 for 2 years is Rs. 96. What is the rate of interest per annum?
Aptitude | Pipes And Cistern

Two pipes A and B together can fill a cistern in 4 hours. Had they been opened separately, then B would have taken 6 hours more than A to fill the cistern. How much time will be taken by A to fill the cistern separately?

Question:
Two pipes A and B together can fill a cistern in 4 hours. Had they been opened separately, then B would have taken 6 hours more than A to fill the cistern. How much time will be taken by A to fill the cistern separately?

[A].

1 hour
[B].
2 hours
[C].
6 hours
[D].
8 hours

Answer: Option C

Explanation:

Let the cistern be filled by pipe A alone in x hours.

Then, pipe B will fill it in (x + 6) hours.

1 + 1 = 1

x (x + 6) 4

x + 6 + x = 1

x(x + 6) 4

x2 – 2x – 24 = 0

(x -6)(x + 4) = 0

x = 6. [neglecting the negative value of x]

Read More Two pipes A and B together can fill a cistern in 4 hours. Had they been opened separately, then B would have taken 6 hours more than A to fill the cistern. How much time will be taken by A to fill the cistern separately?

	36	–	36	=	90
	(10 – x)		(10 + x)		60

Then,	x	= 8 x = 8y
	y

Now,	x + 264	= y
	20

Speed = 22 m/sec =		22 x	18		km/hr = 79.2 km/hr.
			5

Similar Posts