Practice Question and Answer
8 Q: Find the value of sin2 10 + sin2 20 + sin2 30 + ....... + sin2 80.
6289 05ef04c2881a47f2e7ae44392
5ef04c2881a47f2e7ae44392- 13false
- 24true
- 30false
- 41false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "4"
Q: In the following diagram, the triangle represents cricket players, the circle represents ‘students’ the rectangle represents boys and the square represents dancers. The numbers in different segments show the number of persons.
How many students are dances and cricket players but not boys?
6287 15df20503fb64ec452cb6335a
5df20503fb64ec452cb6335aHow many students are dances and cricket players but not boys?
- 17true
- 212false
- 34false
- 416false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "7"
Q: Who has been appointed as the new chairman of Central Board of Indirect taxes and Customs (CBIC)? 6286 115b9a54bfc4c55c03307a6f13
5b9a54bfc4c55c03307a6f13- 1Johnjosephfalse
- 2VanajaN.Sarnafalse
- 3MahenderSinghfalse
- 4S Rameshtrue
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 4. "S Ramesh"
Q: A group of 10 representatives is to be selected out of 12 seniors and 10 juniors. In how many different ways can the group be selected if it should have at least one senior ? 6285 05b5cc6eee4d2b4197774eed7
5b5cc6eee4d2b4197774eed7- 1²²C₁₀ + 1false
- 2²²C₉ + ¹⁰C₁false
- 3²²C₁₀false
- 4²²C₁₀ - 1true
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 4. "²²C₁₀ - 1"
Explanation :
Answer: D) ²²C₁₀ - 1 Explanation: The total number of ways of forming the group of ten representatives is ²²C₁₀. The total number of ways of forming the group that consists of no seniors is ¹⁰C₁₀ = 1 way The required number of ways = ²²C₁₀ - 1
Q: Identify the mirror image of the following figure when the mirror is placed to the right of figure.
6282 15d43b291ea329e61f31b2e3a
5d43b291ea329e61f31b2e3a- 1Afalse
- 2Bfalse
- 3Ctrue
- 4Dfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "C"
Q: Which of these relationships is true of an uncharged atom? 6282 05b5cc688e4d2b4197774c35a
5b5cc688e4d2b4197774c35a- 1The atomic mass is equal to the atomic number.false
- 2The number of electrons is equal to the number of neutrons.false
- 3The number of protons is equal to the number of electrons.true
- 4The atomic mass is equal to the number of electrons.false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "The number of protons is equal to the number of electrons."
Explanation :
Answer: C) The number of protons is equal to the number of electrons. Explanation: The number of protons is equal to the number of electrons. That is the number of positive charges is equal to the number of negative charges.
Q: निम्नलिखित शब्दों में से कौन - सा शब्द ‘अपेक्षा’ के अर्थ का सूचक नहीं है?
6272 05e6389c8f1640a77574eb4a3
5e6389c8f1640a77574eb4a3- 1आशाfalse
- 2निराशाtrue
- 3आवश्यकताfalse
- 4इच्छाfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "निराशा "
Q: Which number is on the face opposite to 6?
6271 05ef42345bea49d16b47d478f
5ef42345bea49d16b47d478f- 14false
- 23false
- 32false
- 41true
- Show AnswerHide Answer
- Workspace
- SingleChoice