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Staff Selection Commission Combined Graduate Level Exam

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Question : If $P=2^2+6^2+10^2+14^2+....+ 94^2$ and $Q=1^2+5^2+9^2+...+81^2$, then what is the value of $P - Q$?

Option 1: 24645

Option 2: 26075

Option 3: 29317

Option 4: 31515

Team Careers360 19th Jan, 2024

Correct Answer: 26075


Solution : Given: $P=2^2+6^2+10^2+14^2+....+94^2$ and $Q=1^2+5^2+9^2+...+81^2$
$⇒P-Q = (2^{2}-1^{2})+(6^{2}-5^{2})+(10^{2}-9^{2})+....+(82^{2}-81^{2})+86^{2}+90^{2}+94^{2}$
$⇒P-Q=3+11+19+27+.......+163(\text{A.P. with 21 terms})+86^{2}+90^{2}+94^{2}$
$⇒P-Q=\frac{21}{2}[2×3+(21–1)8]+86^{2}+90^{2}+94^{2}$
$⇒P-Q=\frac{21}{2}[6+(20)8]+86^{2}+90^{2}+94^{2}$
$⇒P-Q=\frac{21}{2}[166]+(90-4)^{2}+90^{2}+(90+4)^{2}$
$⇒P-Q=1743+(90^{2}-2×90×4+4^{2})+90^{2}+(90^{2}+4^{2}+2×90×4)$
$⇒P-Q=1743+8100+16+8100+8100+16$
$\therefore P-Q=26075$
Hence, the correct answer is 26075.

17 Views

Question : Suman paid INR 9,600 in interest on a loan she obtained 5 years ago with a simple interest rate of 16%. What was the amount of the loan she had taken?

Option 1: INR 13,250

Option 2: INR 12,500

Option 3: INR 12,000

Option 4: INR 11,750

Team Careers360 15th Jan, 2024

Correct Answer: INR 12,000


Solution : Let the principal be $\text{x}$.
We know, Simple interest = $\frac{\text{Principal × Rate × Time}}{100}$
⇒ $9600=\frac{\text{x × 16 × 5}}{100}$
⇒ $\text{x}=\frac{\text{9600 × 100}}{\text{16 × 5}}$
⇒ $\text{x}=12000$
Hence, the correct answer is INR 12000.

37 Views

Question : The mean proportional of $(a+b)(a-b)^3,(a+b)^3(a-b)$ is:

Option 1: $(a+b)^2(a–b)^2$

Option 2: $(a+b)^2(a–b)$

Option 3: $(a+b)(a–b)^2$

Option 4: $a^2-b^2$

Team Careers360 16th Jan, 2024

Correct Answer: $(a+b)^2(a–b)^2$


Solution : Let the mean proportion of $(a+b)(a-b)^3,(a+b)^3(a-b)$ be $x$.
Mean proportion of $A$ and $B$ = $\sqrt{A×B}$
⇒ $x=\sqrt{ (a+b)(a-b)^3 \times (a+b)^3(a-b)}$
⇒ $x = \sqrt{(a+b)^4 (a-b)^4}$
⇒ $x = (a+b)^2(a-b)^2$
Hence, the correct answer is $(a+b)^2(a-b)^2$.

15 Views

Question : Which actinide, discovered by Glenn T. Seaborg in 1940, is used as a heat source for sensitive electrical components in satellites as well as a power source for satellites?

Option 1: Curium

Option 2: Plutonium

Option 3: Nobelium

Option 4: Americium

Team Careers360 21st Jan, 2024

Correct Answer: Plutonium


Solution : The correct option is Plutonium.

Plutonium-238, an Actinide discovered by Glenn T. Seaborg in 1940, is utilised as both a power source and a heat source for delicate electrical components in spacecraft. With thermoelectric generators, the heat generated during the radioactive breakdown of Pu-238 can

16 Views

Question : The centroid of a $\triangle ABC$ is G. The area of $\triangle ABC$ is 60 cm2. The area of $\triangle GBC$ is:

Option 1: 10 cm2

Option 2: 30 cm2

Option 3: 40 cm2

Option 4: 20 cm2

Team Careers360 15th Jan, 2024

Correct Answer: 20 cm2


Solution :
The area of triangle GBC is one-third of the area of $\triangle ABC$.
Given that the area of $\triangle ABC$ is 60 cm2.
The area of $\triangle GBC=\frac{1}{3} \times 60  = 20$ cm2
Hence, the correct answer is 20 cm

6 Views

Question : Directions: Select one of the option figures that is embedded in the given figure (rotation is NOT allowed).

Option 1:

Option 2:

Option 3:

Option 4:

Team Careers360 25th Jan, 2024

Correct Answer:


Solution : The embedded figure will have the same orientation as the main figure. Only the third option figure is embedded in the given figure.

Hence, the third option is correct.

12 Views

Question : Directions: Select the figure that will come next in the following series.

Option 1:

Option 2:

Option 3:

Option 4:

Team Careers360 13th Jan, 2024

Correct Answer:


Solution : Here, the pattern is as follows –
1. In each figure, the circle is rotating by 90° and also moving corner by corner in an anti-clockwise direction.
2. In each figure the arrow mark figure is rotating by 90° in a clockwise direction and moving side

17 Views

Question : Select the most appropriate option that can substitute the underlined segment in the given sentence.

Abhijeet feels extremely tired after working all day long.

Option 1: depressed

Option 2: exhausted

Option 3: sleepy

Option 4: bare

Team Careers360 23rd Jan, 2024

Correct Answer: exhausted


Solution : The correct choice is the second option.

Exhausted is the word that describes someone who feels extremely tired after a long day of work, as it directly conveys the idea of physical fatigue and weariness.

The meanings of the other options are as follows:

55 Views

Question : In the given figure, chords XY and PQ intersect each other at point L. Find the length of XY (in cm).

Option 1: 21

Option 2: 20

Option 3: 22

Option 4: 23

Team Careers360 20th Jan, 2024

Correct Answer: 22


Solution : Given: PQ = 10 cm, QL = 5 cm, YL = 3 cm, and LX = (x + 3) cm.
LQ × LP = LY × LX
Placing the values in the above formula,
5 × 15 = 3 × (x + 3)
⇒ 75

24 Views

Question : At what point does the line $3x+y=-6$ intercept the x-axis?

Option 1: (2, 0)

Option 2: (–2, 0)

Option 3: (0, –6)

Option 4: (0, 6)

Team Careers360 17th Jan, 2024

Correct Answer: (–2, 0)


Solution : At an x-intercept, y = 0.
So, 3x + 0 = – 6
Solving for x,
⇒ 3x = – 6
⇒ x = – 2
So, the required intercept point = (–2, 0)
Hence, the correct answer is (–2, 0).

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