Major Competitive Exams

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Q. In a certain number system, the number '101' represents the decimal number 5. What does '110' represent in the same system?
  • A. 6
  • B. 7
  • C. 8
  • D. 9
Q. In a certain number system, the number '101' represents the decimal number 5. What does '111' represent in the same system?
  • A. 6
  • B. 7
  • C. 8
  • D. 9
Q. In a certain number system, the number '123' represents the decimal number 27. What is the base of this number system?
  • A. 3
  • B. 4
  • C. 5
  • D. 6
Q. In a certain number system, the number '210' represents the decimal number 42. What is the decimal equivalent of '102' in the same system?
  • A. 20
  • B. 21
  • C. 22
  • D. 23
Q. In a certain number system, the number 'A' represents 10. What is the value of 'B' if 'B' represents 11?
  • A. 10
  • B. 11
  • C. 12
  • D. 13
Q. In a certain number system, the number 12 is represented as 'A' and the number 18 as 'B'. If 'A' is a factor of 'B', which of the following statements is true?
  • A. A is greater than B
  • B. B is a multiple of A
  • C. A and B are equal
  • D. A is a multiple of B
Q. In a certain number, if 12 is added to it, the result is a multiple of 5. What can be inferred about the original number?
  • A. It is a multiple of 5.
  • B. It is a multiple of 12.
  • C. It is one less than a multiple of 5.
  • D. It is one more than a multiple of 5.
Q. In a certain numeral system, the number '123' represents the decimal number 27. What is the value of '321' in the same system?
  • A. 72
  • B. 81
  • C. 90
  • D. 99
Q. In a certain polygon, the exterior angle at each vertex measures 45 degrees. How many sides does this polygon have?
  • A. 4
  • B. 5
  • C. 8
  • D. 10
Q. In a certain state, the ratio of the number of MLAs to the number of MPs is 5:1. If there are 30 MPs, how many MLAs are there?
  • A. 150
  • B. 120
  • C. 100
  • D. 180
Q. In a certain town, the ratio of the number of men to women is 3:2. If there are 120 men, how many women are there?
  • A. 80
  • B. 60
  • C. 40
  • D. 100
Q. In a certain town, the ratio of the number of men to women is 3:4. If there are 120 men, how many women are there?
  • A. 80
  • B. 90
  • C. 100
  • D. 110
Q. In a certain year, the Parliament passed 150 bills. If 60% of these bills were passed in the Lok Sabha, how many bills were passed in the Lok Sabha?
  • A. 90
  • B. 80
  • C. 70
  • D. 60
Q. In a chemical reaction, if the enthalpy change is positive, the reaction is classified as:
  • A. Exothermic
  • B. Endothermic
  • C. Isothermal
  • D. Adiabatic
Q. In a chemical reaction, if the enthalpy of products is less than that of reactants, what can be concluded?
  • A. The reaction is endothermic
  • B. The reaction is exothermic
  • C. The reaction is at equilibrium
  • D. The reaction is spontaneous
Q. In a chemical reaction, what does the term 'activation energy' refer to? (2023)
  • A. Energy released during the reaction
  • B. Energy required to initiate the reaction
  • C. Energy needed to maintain the reaction
  • D. Energy that is lost
Q. In a chess tournament, each player plays every other player exactly once. If there are 10 players, how many games are played?
  • A. 45
  • B. 50
  • C. 40
  • D. 55
Q. In a chess tournament, each player plays every other player once. If there are 12 players, how many games are played?
  • A. 66
  • B. 72
  • C. 60
  • D. 78
Q. In a circle, if an angle subtended by an arc at the center is 80 degrees, what is the angle subtended by the same arc at any point on the circumference?
  • A. 20 degrees
  • B. 40 degrees
  • C. 80 degrees
  • D. 160 degrees
Q. In a circle, if the angle subtended by an arc at the center is 60 degrees, what is the angle subtended at any point on the circumference?
  • A. 30 degrees
  • B. 60 degrees
  • C. 90 degrees
  • D. 120 degrees
Q. In a circle, if the angle subtended by an arc at the center is 60 degrees, what is the angle subtended at any point on the remaining part of the circle?
  • A. 30 degrees
  • B. 60 degrees
  • C. 90 degrees
  • D. 120 degrees
Q. In a circle, if the length of an arc is 10 cm and the radius is 5 cm, what is the angle in radians subtended by the arc at the center? (2021)
  • A. 1 rad
  • B. 2 rad
  • C. 3 rad
  • D. 4 rad
Q. In a circle, if the radius is increased by 50%, what happens to the area?
  • A. Increases by 25%
  • B. Increases by 50%
  • C. Increases by 75%
  • D. Increases by 125%
Q. In a circuit with a 10V battery and two resistors (3Ω and 6Ω) in series, what is the voltage drop across the 6Ω resistor?
  • A. 2V
  • B. 4V
  • C. 6V
  • D. 8V
Q. In a circuit with a 10V battery and two resistors in parallel (4Ω and 6Ω), what is the voltage across each resistor?
  • A. 10V for both
  • B. 5V for both
  • C. 10V for 4Ω and 6V for 6Ω
  • D. 10V for 6Ω and 4V for 4Ω
Q. In a circuit with a 10V battery and two resistors in series (2Ω and 3Ω), what is the voltage drop across the 3Ω resistor?
  • A. 4V
  • B. 6V
  • C. 8V
  • D. 10V
Q. In a circuit with a 10V battery and two resistors in series (R1 = 2Ω, R2 = 3Ω), what is the current flowing through the circuit?
  • A. 2A
  • B. 1A
  • C. 0.5A
  • D. 3A
Q. In a circuit with a 10V battery and two resistors in series (R1 = 2Ω, R2 = 8Ω), what is the current flowing through the circuit?
  • A. 0.5A
  • B. 1A
  • C. 2A
  • D. 5A
Q. In a circuit with a 10V battery and two resistors of 5 ohms each in series, what is the current flowing through the circuit?
  • A. 1 A
  • B. 2 A
  • C. 0.5 A
  • D. 5 A
Q. In a circuit with a 10V battery and two resistors of 5Ω each in series, what is the voltage across the second resistor?
  • A. 5V
  • B. 10V
  • C. 2.5V
  • D. 0V
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