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Question : Surface water is a better source of drinking water because it is poor in

Option 1: Dust

Option 2: Bacteria

Option 3: Arsenic

Option 4: Algae

Team Careers360 19th Jan, 2024

Correct Answer: Arsenic


Solution : The correct answer is Arsenic.

Due to its low arsenic content, surface water is a preferable source of drinking water. Rocks and soil contain the naturally occurring metal arsenic. Additionally, it can infiltrate water sources due to human activity like mining, and smelting. Cancer, heart

60 Views

Question : A train crosses a stationary pole completely in 18 seconds and a bridge completely in 44 seconds. If the length of the bridge is 650 meters, then what is the length of the train?

Option 1: 540 m

Option 2: 360 m

Option 3: 450 m

Option 4: 270 m

Team Careers360 22nd Jan, 2024

Correct Answer: 450 m


Solution : Let the length of the train be $l$ and the speed of the train be $s$.
Time = 18 sec
So, $s = \frac{l}{18}$ --------(i)
Length of the bridge = 650 m
Total distance = $650+l$
Time = 44 sec
$s = \frac{650+l}{44}$ --------(ii)

12 Views

Question : Directions: In the following question, find the odd number from the given alternatives.

Option 1: 95

Option 2: 145

Option 3: 114

Option 4: 152

Team Careers360 16th Jan, 2024

Correct Answer: 145


Solution : Let's check the given options –

First option: 95; 95 ÷ 19 = 5
Second option: 145; 145 is not divisible by 19.
Third option: 114; 114 ÷ 19 = 6
Fourth option: 152; 152 ÷ 19 = 8

So, 145 is not divisible by

1 View

Question : What is the number of common tangents that can be drawn to two circles that touch each other externally?

Option 1: 2

Option 2: 4

Option 3: 3

Option 4: 1

Team Careers360 24th Jan, 2024

Correct Answer: 3


Solution : Only three tangents can be drawn passing through two external touching circles.


Hence, the correct answer is 3.

24 Views

Question : A and B can do a piece of work in 36 days. B and C can do the same work in 60 days. A and C can do the same work in 45 days. In how many days can A alone complete the same work?

Option 1: 90

Option 2: 60

Option 3: 120

Option 4: 45

Team Careers360 18th Jan, 2024

Correct Answer: 90


Solution : According to the question,
Let the total Work = LCM of 36, 60 and 45 = 180
The efficiency of (A + B) = $\frac{180}{36}$ = 5 units/day
The efficiency of (B + C) = $\frac{180}{60}$ = 3 units/day
The efficiency of (C + A)

25 Views

Question : $\triangle$XYZ is right angled at Y. If $\cos X=\frac{3}{5}$, then what is the value of $\operatorname{cosec}Z$?

Option 1: $\frac{3}{4}$

Option 2: $\frac{5}{3}$

Option 3: $\frac{4}{5}$

Option 4: $\frac{4}{3}$

Team Careers360 17th Jan, 2024

Correct Answer: $\frac{5}{3}$


Solution :
Given: $\triangle$XYZ is right-angled at Y and $\cos X=\frac{3}{5}$
Since $\triangle$XYZ is right-angled at Y,
So, X + Z = 90°
⇒ X = 90° – Z
Now, $\cos X=\frac{3}{5}$
⇒ $\cos(90°–Z)=\frac{3}{5}$
⇒ $\sin Z=\frac{3}{5}$
$\therefore\operatorname{cosec}Z=\frac{5}{3}$ [$\because$ $\operatorname{cosec}Z=\frac{1}{\sin Z}$]
Hence, the correct answer is $\frac{5}{3}$.

9 Views

Question : The hydrophilic nature of DNA is due to the presence of:

Option 1: thymine base

Option 2: many hydrogen bonds

Option 3: phosphate group

Option 4: deoxyribose sugar

Team Careers360 17th Jan, 2024

Correct Answer: phosphate group


Solution : The correct option is the phosphate group.

Being hydrophilic refers to having an affinity for water or having the ability to interact with it by forming hydrogen bonds. Due to the presence of phosphate groups, which have a negative charge from extra electrons, and

20 Views

Question : Select the most appropriate option to substitute the underlined segment in the given sentence. If there is no need to substitute it, select ‘No substitution required’. 
Because she didn’t love him, she had to marry him

Option 1: Despite

Option 2: No substitution required

Option 3: Since

Option 4: Although

Team Careers360 23rd Jan, 2024

Correct Answer: Although


Solution : The fourth option is the correct answer.

The sentence currently presents a causal relationship, indicating that the reason for her marrying him is because she didn't love him. "Although" introduces a contrast or concession, indicating that despite the fact that she didn't love him, she

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