Practical Mathematics
73 questions available
FILTER BY SUBTOPIC
Q61.What is the hallmark number for 22 Karat gold?
Correct Answer: C
The hallmark number 916 corresponds to 22 Karat gold, representing its 91.6% purity.
Q62.18 Karat gold contains how much gold?
Correct Answer: B
18 Karat gold is made of 18/24 parts of pure gold, representing exactly 75% purity.
Q63.12 Karat gold contains how much gold?
Correct Answer: B
12 Karat gold contains 12/24 parts of pure gold, representing exactly 50% purity.
Q64.One mile is equal to how many kilometers?
Correct Answer: A
By internationally accepted standard conversion, 1 mile is equal to 1.60934 kilometers.
Q65.Convert 200° F into Celsius (°C).
Correct Answer: C
°C = (°F - 32) × 5/9 = (200 - 32) × 5/9 = 168 × 5/9 ≈ 93.3°C.
Q66.Solve and convert: 445 mm − 198 mm + 250 mm = ?
Correct Answer: A
445 - 198 + 250 = 497 mm. Since 10 mm = 1 cm, 497 mm = 49.7 cm.
Q67.Calculate in centimeters: 187 m − 95 m + 328 m = ?
Correct Answer: A
187 - 95 + 328 = 420 m. 420 m × 100 cm/m = 42,000 cm.
Q68.What is 250 mm + 350 mm in centimeters (cm)?
Correct Answer: B
250 mm + 350 mm = 600 mm = 60 cm.
Q69.If apples cost 15 rupees each, how many apples can you buy with 120 rupees?
Correct Answer: C
Total apples = 120 / 15 = 8.
Q70.If the price of 1 dozen eggs is Rs 22, what will be the price of 30 eggs?
Correct Answer: C
Price per egg = 22 / 12. Price of 30 eggs = 30 * (22/12) = 55.
Q71.1 square foot is equal to how many square inches?
Correct Answer: D
1 foot = 12 inches. 1 square foot = 12 in x 12 in = 144 square inches.
Q72.How many days are there in 2 weeks?
Correct Answer: B
There are 7 days in a week, so in 2 weeks (a fortnight) there are: 2 × 7 = 14 days.
Q73.A binary number 1100011 has the decimal value equal to _____?
Correct Answer: A
Convert binary 1100011 to decimal: 1*2^6 + 1*2^5 + 0*2^4 + 0*2^3 + 0*2^2 + 1*2^1 + 1*2^0 = 64 + 32 + 0 + 0 + 0 + 2 + 1 = 99.