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Algebra
At present, the age of Ali is (x - 10) years. What will be his age after 12 years?
Ali's current age is given as (x - 10) years. After 12 years, his age will be (x - 10) + 12 = x + 2 years. Therefore, the correct answer is option A: x + 2.
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Global Health
When did the World Health Organization (WHO) officially declare COVID-19 a pandemic?
The World Health Organization (WHO) officially declared COVID-19 a pandemic on March 11, 2020, recognizing the global spread and severity of the virus.
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International Development
What is the name of the project the European Union announced in December 2021 to support infrastructure development around the world, apparently to counter China's Belt and Road Initiative (BRI)?
The European Union announced the 'Global Gateway' initiative in December 2021 to support infrastructure development worldwide as a strategic alternative to China's Belt and Road Initiative (BRI). This makes option A the correct answer.
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Politics
Who is the current Chancellor of Germany?
Olaf Scholz became the Chancellor of Germany in December 2021, succeeding Angela Merkel. Therefore, option B is correct.
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Percentages
If A's salary is 50% more than B's, then by what percent is B's salary less than A's salary?
If A's salary is 50% more than B's, then A = 1.5 × B. To find by what percent B's salary is less than A's, we calculate the percentage difference relative to A: ((A - B) / A) × 100 = ((1.5B - B) / 1.5B) × 100 = (0.5B / 1.5B) × 100 = 33 1/3%. This matches option C, which correctly represents 33 1/3%. Options A and B represent 33.25% and 33.5% respectively, which are incorrect. Therefore, the correct answer is option C.
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Relative Pronouns
Is this the bus ___ goes to the Saddar Bazar?
The correct relative pronoun to refer to 'bus' (an object) in defining relative clauses is 'that'. 'Which' is generally used in non-defining clauses or with commas, and 'who' refers to people. Therefore, 'Is this the bus that goes to the Saddar Bazar?' is correct.
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Percentages
5% of 5% of Rs. 100 is:
5% of Rs. 100 is Rs. 5. Then, 5% of Rs. 5 is Rs. 0.25. Therefore, 5% of 5% of Rs. 100 equals Rs. 0.25.
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FIA Act
The term 'rules' under the FIA Act connotes:
Under the FIA Act, the term 'rules' specifically refers to the rules framed under the Act itself, which govern its implementation and procedures. This is a standard legal interpretation where 'rules' denote subsidiary legislation made under the authority of the Act.
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Set Theory (Power Set)
The number of elements in the power set of {1, 2, 3} is:
The power set of a set with n elements contains 2^n elements. Since the set {1, 2, 3} has 3 elements, its power set has 2^3 = 8 elements.
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Number Series
Which number will come next? 2, 5, 12, 23, 38, 57, ___
The differences between the numbers are increasing by 2 each time: 5-2=3, 12-5=7, 23-12=11, 38-23=15, 57-38=19. The next difference should be 23 (19+4), so the next number is 57+23=80. Since 80 is not an option, the closest correct option is 'None of these'. However, since 'None of these' is option D, and the original options do not include 80, the correct answer is D.