Practise 100 Most Repeated MCQs of Math MCQs in Maths. Attempt multiple-choice questions, check answers and revise related subtopics.
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Answer: 1000 mg
Explanation 1 kilogram (kg) of gold = 1,000 grams (g) 1 gram (g) of gold = 1,000 milligrams (mg) 1 ounce (oz) of gold ≈ 31.1 grams (g) A kilogram is equal to 2.2 pound . Gold density: 19.3 g/cm³ Gold melting point: 1,064°C (1,947°F)
Answer: 33
Explanation 400-367=33
Answer: 8
Explanation The mean proportional of two numbers is the square root of their product. Mean proportional = √(4 × 16) = √64 = 8
Answer: 22 years
Explanation Let the age of the man be x Then the age of his son becomes (x−24) 2 years later from now, The age of man will be = x+2 and age of his son will be =(x−24+2)=x−22 According to the question, 2(x−22)=x+2 i.e., 2x−44=x+2 i.e., x=46 Therefore, The present age of man=46 years And present age of his son = is 46−24 = 22 years ND29-5-2023
Answer: 34.64 m
Explanation We can solve this problem using trigonometry. Let's denote: ℎ h as the height of the tower, 𝑑 d as the horizontal distance from the point to the base of the tower, 𝜃 θ as the angle of elevation (which is 60 degrees in this case). In a right triangle formed by the tower, the horizontal distance, and the line of sight to the top of the tower, we have: tan ( 𝜃 ) = ℎ 𝑑 tan ( θ ) = d h Given that 𝜃 = 6 0 ∘ θ = 6 0 ∘ and 𝑑 = 20 d = 20 meters, we can plug in these values and solve for ℎ h : tan ( 6 0 ∘ ) = ℎ 20 tan ( 6 0 ∘ ) = 20 h 3 = ℎ 20 3 = 20 h ℎ = 20 × 3 h = 20 × 3 ℎ ≈ 20 × 1.732 h ≈ 20 × 1.732 ℎ ≈ 34.64 h ≈ 34.64 So, the height of the tower is approximately 34.64 meters.
Answer: quotient
Explanation The answer after we divide one number by another. dividend ÷ divisor = quotient. Example: in 12 ÷ 3 = 4, 4 is the quotient.
Answer: Bright and shining
Explanation An item that attracts a great deal of attention because of its superficial characteristics
Answer: 56
Explanation A polygon with 8 sides has 8 vertices. To form a triangle, you need to choose 3 vertices out of these 8. This can be done in: 8C3 = 8! / (3! x (8-3)!) = 8! / (3! x 5!) = (8 x 7 x 6) / (3 x 2 x 1) = 56 So, 56 triangles can be formed by joining the angular points of a polygon with 8 sides.
کتنے طریقوں سے 8 پاکستانیوں اور 4 امریکی اور 4 انگریزوں کو ایک قطار میں بٹھایا جا سکتا ہے تاکہ ایک ہی قومیت کے تمام افراد ایک ساتھ بیٹھ سکیں؟
Answer: 3! 4! 8! 4!
Explanation Taking all person of same nationality as one person, then we will have only three people. These three person can be arranged themselves in 3! Ways. 8 Indians can be arranged themselves in 8! Way. 4 American can be arranged themselves in 4! Ways. 4 Englishman can be arranged themselves in 4! Ways. Hence, required number of ways = 3! 8! 4! 4! Ways.
Answer: 80 days
Explanation To solve this problem, we can use the concept of man-days: 8 people × 60 days = 480 man-days Since the amount of work remains the same, we can set up an equation for 6 people: 6 people × x days = 480 man-days To find the number of days, divide 480 by 6: x = 480 ÷ 6 x = 80 days
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