Staff Selection Commission Combined Higher Secondary Level Exam
Question : A can do work in 18 days and B in 24 days. If they work on it together for 5 days, then find the fraction of the work that is left.
Option 1: $\frac{35}{72}$
Option 2: $\frac{7}{72}$
Option 3: $\frac{37}{72}$
Option 4: $\frac{33}{72}$
Correct Answer: $\frac{37}{72}$
Solution : Given: A can do a work in 18 days and B in 24 days. Efficiency of A = $\frac{1}{18}$ Efficiency of B = $\frac{1}{24}$ Combined efficiency of A and B = $\frac{1}{18}+\frac{1}{24}$ = $\frac{7}{72}$ Hence, total work done in 5 days = $5\times \frac{7}{72}=\frac{35}{72}$ Fraction
Question : Six numbers are arranged in decreasing order. The average of the first five numbers is 30, and the average of the last five numbers is 25. The difference between the first and last numbers is:
Option 1: 20
Option 2: 25
Option 3: 5
Option 4: 30
Correct Answer: 25
Solution : Let the six numbers be a, b, c, d, e, and f The average of the 1st five numbers is 30 So, a+b+c+d+e = 30×5 = 150 ......................(1) The average of the last five numbers is 25. So, b+c+d+e+f = 25×5 =125 .......................(2) Subtracting equation
Question : Birju Maharaj was a noted dancer of _____.
Option 1: Kathak
Option 2: Manipuri
Option 3: Sattriya
Option 4: Bharatanatyam
Correct Answer: Kathak
Solution : The correct answer is Kathak.
Birju Maharaj was a renowned dancer of Kathak, which is one of the classical dance forms of India. He belongs to the Kalka-Bindadin gharana (a lineage or style within Kathak) and is a leading exponent of this dance form. His
Question : Directions: If A stands for ÷, B stands for ×, C stands for +, and D stands for – what will come in the place of the question mark (?) in the following equation? 31 B 5 D 12 C 56 A 14 = ?
Option 1: 137
Option 2: 127
Option 3: 147
Option 4: 117
Correct Answer: 147
Solution : Given: 31 B 5 D 12 C 56 A 14 = ?
On, replacing the alphabet with the mathematical signs, we get – = 31 × 5 – 12 + 56 ÷ 14 = 31 × 5 – 12 + 4 = 155 + 4
Question : Select the option that expresses the given sentence in active voice.
I was never supported by my family.
Option 1: My family have never supported me.
Option 2: My family had never supported me.
Option 3: My family never supported me.
Option 4: My family never supports me.
Correct Answer: My family never supported me.
Solution : The correct option is the third option.
The given sentence is in the passive voice, where the action is done to the subject ("I") by the doer. In active voice, the subject performs the action.
The sentence structure in the active
Question : Directions: In the following question, find the odd letter cluster from the given alternatives.
Option 1: LNP
Option 2: MOQ
Option 3: BDE
Option 4: EGI
Correct Answer: BDE
Solution : Let's check each option – First option: LNP; L + 2 = N, N + 2 = P Second option: MOQ; M + 2 = O, O + 2 = Q Third option: BDE; B + 2 = D, D + 1 = E Fourth
Question : If $(p-q)=6,(r-q)=5$ and $(r-p)=3$, then find the value of $\frac{p^3+q^3+r^3-3 p q r}{p+q+r}$.
Option 1: 35
Option 2: 45
Option 3: 30
Option 4: 40
Correct Answer: 35
Solution : Given, $(p - q) = 6,$ $(r - q) = 5$ and $(r - p) = 3$ We know, $p^3 + q^3 + r^3 - 3pqr = (p + q + r)(p^2 + q^2+ r^2 - pq - pr - qr)$ $⇒\frac{p^3+q^3+r^3-3 p q r}{p+q+r}
Question : Directions: In the following question, a sentence is given with blanks that are to be filled in with appropriate words. Four alternatives are suggested; choose the correct alternative out of them as your answer.
I have no ____________office work.
Option 1: Experience to
Option 2: Experience in
Option 3: Experience on
Option 4: Experience of
Correct Answer: Experience of
Solution : The fourth option is correct because "experience of" is a common phrase that shows if someone has ever done or been a part of something, i.e., in a particular field or activity.
Experience with: "With" is used after "experience"
Question : The following line graph shows the exports by company A and company B (in crores) over the five years 2010 to 2014.
In which year, the difference between the exports from company A and company B was maximum? (Currency is Indian rupees.)
Option 1: 2013
Option 2: 2014
Option 3: 2012
Option 4: 2011
Correct Answer: 2014
Solution : From the given graph: The difference in the year 2010 = 150 – 100 = 50 The difference in the year 2011 = 120 – 80 = 40 The difference in the year 2012 = 120 – 100 = 20 The difference in the year
Question : At high doses, _____________kills cancer cells or slows their growth by damaging their DNA. Cancer cells whose DNA is damaged beyond repair stop dividing or die. When the damaged cells die, they are broken down and removed by the body.
Option 1: Chemotherapy
Option 2: Radiation therapy
Option 3: Surgery
Option 4: Physiotherapy
Correct Answer: Radiation therapy
Solution : The correct option is Radiation therapy.
Radiation therapy is a treatment modality that kills cancer cells. In radiation therapy, high doses of ionizing radiation are used to target and damage the DNA of cancer cells. This damage prevents the cancer cells from dividing and
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