Staff Selection Commission Combined Higher Secondary Level Exam
Question : Damping off seedlings is caused by
Option 1: Peronospora parasitica
Option 2: Albugo candida
Option 3: Phytophthora infestans
Option 4: Pythium debaryanum
Correct Answer: Pythium debaryanum
Solution : The correct answer is Pythium debaryanum.
Damping off is a horticultural disease in which seeds and seedlings die or weaken before germination. It is caused by soil-borne fungi, and the most common fungi responsible for it is Pythium debaryanum. Phytophthora, Alternaria and Fusarium
Question : Directions: Select the number from among the given options that can replace the question mark (?) in the following series. 383, 381, 377, 369, 353, (?)
Option 1: 325
Option 2: 323
Option 3: 322
Option 4: 321
Correct Answer: 321
Solution : Given: 383, 381, 377, 369, 353, (?)
Follow the pattern to find the missing term –
So, 321 is the missing term in the series. Hence, the fourth option is correct.
Question : If $a-b=8$ and $4ab=84$, then what is the value of $3a^3-3b^3$?
Option 1: 1016
Option 2: 2032
Option 3: 1018
Option 4: 3048
Correct Answer: 3048
Solution : Given: $a-b=8$ and $4ab=84$ ⇒ $ab=21$ Now, $a-b=8$ Cubing both sides we get, ⇒ $(a-b)^3=8^3$ ⇒ $a^3-b^3-3ab(a-b)=512$ Putting the values, we get: ⇒ $a^3-b^3-3\times 21\times8=512$ ⇒ $a^3-b^3=512+504$ ⇒ $a^3-b^3=1016$ $\therefore 3a^3-3b^3 =3\times1016=3048$ Hence, the correct answer is 3048.
Question : Select the option that will improve the (bracketed) part of the sentence. In case of no improvement, select the option 'No improvement'. Check all radiators for (meagre leaks, special) round pipework connections.
Option 1: No improvement
Option 2: cramped leaks, specially
Option 3: small leaks, especially
Option 4: modest leaks, specially
Correct Answer: small leaks, especially
Solution : The third option is correct.
The term meagre leaks is not commonly used and can be confusing. Also, the adverb especially is the correct word to use here because it emphasises that particular attention should be given to the pipework connections.
Therefore,
Question : The given expression is equal to $\frac{\sin^4 A+\cos^4 A}{1-2 \sin^2 A \cos^2 A}$:
Option 1: 1
Option 2: –1
Option 3: 0
Option 4: 2
Correct Answer: 1
Solution : $\frac{\sin^4 A+\cos^4 A}{1-2 \sin^2 A \cos^2 A}$ Since $\sin^2A+\cos^2 A=1$ and $(\sin^2A+\cos^2 A)^2=1$, $=\frac{\sin^4 A+\cos^4 A}{(\sin^2A+\cos^2 A)^2 -2 \sin^2 A \cos^2 A}$ $= \frac{\sin^4 A+\cos^4 A}{\sin^4A+\cos^4 A -2 \sin^2 A \cos^2 A +2 \sin^2 A \cos^2 A}$ $=\frac{\sin^4 A+\cos^4 A}{\sin^4A+\cos^4 A }$ $=1$ Hence, the
Question : Laho is the dance form of which state?
Option 1: Manipur
Option 2: Sikkim
Option 3: Meghalaya
Option 4: Kerala
Correct Answer: Meghalaya
Solution : The correct option is Meghalaya.
The indigenous Garo people of Meghalaya execute a traditional dance called Laho Dance. The Laho dance is performed during various social and cultural events, such as harvest festivals, religious ceremonies, and community gatherings.
Question : Who discovered the Cape of Good Hope in 1488?
Option 1: Magellan
Option 2: Columbus
Option 3: Bartolomeu Dias
Option 4: Vasco da Gama
Correct Answer: Bartolomeu Dias
Solution : The correct answer is Bartolomeu Dias.
After establishing the southern limits of the African continent, the Portuguese explorer Bartolomeu Dias (1450–1500) became the first European mariner to go past the southern tip of Africa in 1488. This opened the way for a sea route
Question : Directions: Which of the given responses will be a meaningful order of the following? 1. Stone 2. Sand 3. Rock 4. Boulder 5. Hill
Option 1: 2, 1, 3, 4, 5
Option 2: 5, 3, 2, 1, 4
Option 3: 5, 4, 2, 1, 3
Option 4: 1, 4, 2, 3, 5
Correct Answer: 2, 1, 3, 4, 5
Solution : Given: 1. Stone 2. Sand 3. Rock 4. Boulder 5. Hill
The given words can be arranged as follows – Sand forms the stone, stone forms the rock, rock forms the boulder, and boulders form the hill.
So, 2, 1, 3,
Question : Directions: What should come in place of the question mark (?) in the given series? 9, 14, ?, 24, 29, 34
Option 1: 18
Option 2: 19
Option 3: 21
Option 4: 20
Correct Answer: 19
Solution : Given: 9, 14, ?, 24, 29, 34
In the given series, add 5 to the previous number to get the next number. 9 + 5 = 14; 14 + 5 = 19; 19 + 5 = 24; 24 + 5 = 29; 29 + 5
Question : Directions: Select the figure from the given options that can replace the question mark (?) in the following series.
Option 1:
Option 2:
Option 3:
Option 4:
Correct Answer:
Solution : According to the given figure – 1. The movement of geometrical shapes is as follows – Square – Top right→Top left→Top centre→Top right Triangle – Bottom left→Bottom centre→Bottom right→Bottom left Diamond – Centre of the box→Right centre→Left centre→Centre of the box 2. The triangle rotates by
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