Aptitude | Numbers

106 x 106 – 94 x 94 = ?

Byadmin July 18, 2022

Question:
106 x 106 – 94 x 94 = ?

[A].

2400

[B].

2000

[C].

1904

[D].

1906

Answer: Option A

Explanation:

106 x 106 – 94 x 94	= (106)2 – (94)2
	= (106 + 94)(106 – 94) [Ref: (a2 – b2) = (a + b)(a – b)]
	= (200 x 12)
	= 2400.

Aptitude | Time And Work

A takes twice as much time as B or thrice as much time as C to finish a piece of work. Working together, they can finish the work in 2 days. B can do the work alone in:

Question: A takes twice as much time as B or thrice as much time as C to finish a piece of work. Working together, they can finish the work in 2 days. B can do the work alone in:

[A].

4 days
[B].
6 days
[C].
8 days
[D].
12 days

Answer: Option B

Explanation:

Suppose A, B and C take x, x and x days respectively to finish the work.

2 3

Then, 1 + 2 + 3 = 1

x x x 2

6 = 1

x 2

x = 12.

So, B takes (12/2) = 6 days to finish the work.

Read More A takes twice as much time as B or thrice as much time as C to finish a piece of work. Working together, they can finish the work in 2 days. B can do the work alone in:
Aptitude | Numbers

The smallest 5 digit number exactly divisible by 41 is:

Question:
The smallest 5 digit number exactly divisible by 41 is:

[A].

1004
[B].
10004
[C].
10045
[D].
10025

Answer: Option B

Explanation:

The smallest 5-digit number = 10000.

41) 10000 (243
82
—
180
164
—-
160
123
—
37
—

Required number = 10000 + (41 – 37)
= 10004.

Read More The smallest 5 digit number exactly divisible by 41 is:
Aptitude | Average

A library has an average of 510 visitors on Sundays and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is:

Question:
A library has an average of 510 visitors on Sundays and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is:

[A].

250
[B].
276
[C].
280
[D].
285

Answer: Option D

Explanation:

Since the month begins with a Sunday, to there will be five Sundays in the month.

Required average

= 510 x 5 + 240 x 25

30

= 8550

30

= 285

Read More A library has an average of 510 visitors on Sundays and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is:
Aptitude | Numbers

(12)3 x 64 ÷ 432 = ?

Question: (12)3 x 64 ÷ 432 = ?
[A].

5184
[B].
5060
[C].
5148
[D].
5084

Answer: Option A

Explanation:

Given Exp. = (12)3 x 64 = (12)3 x 64 = (12)2 x 62 = (72)2 = 5184

432 12 x 62

Read More (12)3 x 64 ÷ 432 = ?
Compound Interest | Mathematics Mcqs

If the C.I. on a sum for 2 years at 12 1/2 % per annum is Rs. 510, the S.I. on the same sum at the same rate for the same period of time is________?

If the C.I. on a sum for 2 years at 12 1/2 % per annum is Rs. 510, the S.I. on the same sum at the same rate for the same period of time is________?

A. Rs. 400
B. Rs. 450
C. Rs. 460
D. Rs. 480
Explanation:
Let the sum be Rs. P. Then,
[P(1 + 25/(2 * 100))2 – P] = 510
P[(9/8)2 – 1] = 510.
Sum = Rs. 1920
So, S.I. = (1920 * 25 * 2) / (2 * 100) = Rs. 480

Read More If the C.I. on a sum for 2 years at 12 1/2 % per annum is Rs. 510, the S.I. on the same sum at the same rate for the same period of time is________?
Aptitude | Numbers

The difference of the squares of two consecutive odd integers is divisible by which of the following integers ?

Question:
The difference of the squares of two consecutive odd integers is divisible by which of the following integers ?

[A].

3
[B].
6
[C].
7
[D].
8

Answer: Option D

Explanation:

Let the two consecutive odd integers be (2n + 1) and (2n + 3). Then,

(2n + 3)2 – (2n + 1)2 = (2n + 3 + 2n + 1) (2n + 3 – 2n – 1)

= (4n + 4) x 2

= 8(n + 1), which is divisible by 8.

Read More The difference of the squares of two consecutive odd integers is divisible by which of the following integers ?

Suppose A, B and C take x,	x	and	x	days respectively to finish the work.
	2		3

Then,		1	+	2	+	3		=	1
		x		x		x			2

Given Exp. =	(12)3 x 64	=	(12)3 x 64	= (12)2 x 62 = (72)2 = 5184
	432		12 x 62

Similar Posts