This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.

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Okay, let's tackle these math problems.
Question 1: Numbers can be written in figures and in words. Write 17,208,304 in words.
Step 1: Break down the number by place value. The number is 17,208,304. • 17 is in the millions place. • 208 is in the thousands place. • 304 is in the hundreds, tens, and ones place.
Step 2: Write each part in words. • 17,000,000 is seventeen million. • 208,000 is two hundred eight thousand. • 304 is three hundred four.
Step 3: Combine the parts. The number in words is seventeen million, two hundred eight thousand, three hundred four.
The answer is:
Question 2: Your uncle sent you some money through Western Union. The amount was written in Roman numbers as VMCMXLV. Write this amount in Arabic figures.
Step 1: Break down the Roman numeral into its components. V M C M X L V
Step 2: Convert each component to its Arabic value. • V = 5 • M = 1000 • C = 100 • M = 1000 • X = 10 • L = 50 • V = 5
Step 3: Apply the rules for Roman numerals (subtraction and addition). • VM: This is not a standard Roman numeral combination. It seems there might be a typo in the question, as 'V' (5) cannot precede 'M' (1000) in standard Roman numeral notation to indicate subtraction. If it were intended as a large number, it would typically be written with larger values first. Let's assume the 'V' at the beginning is a mistake and the number starts with MCMXLV, or that 'VM' is a non-standard representation for a very large number. Given the context of typical Roman numeral problems, it's more likely a standard number.
Let's re-evaluate the Roman numeral string: VMCMXLV. If we interpret it strictly: V = 5 M = 1000 CM = 900 (C before M means 1000 - 100) XL = 40 (X before L means 50 - 10) V = 5
If the 'V' at the beginning is a separate digit, it would be 5 + 1000 + 900 + 40 + 5 = 1950. However, Roman numerals are usually written in descending order of value, with subtractive pairs (like CM, XL) being exceptions. A 'V' at the very beginning followed by 'M' is highly unusual.
Let's consider the possibility that the 'V' is part of a larger number, or that the question intended a different sequence. If it was MCMXLV, the value would be .
Given the unusual "VM" at the start, and the common structure of Roman numerals, it's highly probable that the 'V' at the beginning is either a typo or meant to be part of a larger number that isn't standard. However, if we treat it as a sequence of individual Roman numerals and apply the rules: V = 5 M = 1000 CM = 900 XL = 40 V = 5
If we assume the 'V' at the beginning is a separate value, and then the rest follows standard rules: .
However, the most common interpretation for a sequence like this, especially if it's a single number, would be to look for standard subtractive pairs. MCMXLV: M = 1000 CM = 900 (1000 - 100) XL = 40 (50 - 10) V = 5 Summing these: .
The initial 'V' in "VMCMXLV" is problematic. If it's a typo and should be MCMXLV, the answer is 1945. If it's meant to be a very large number, it's not standard. Assuming the most common interpretation of such a sequence, and that the 'V' at the beginning is a mistake or part of a larger, non-standard notation, I will proceed with the standard interpretation of MCMXLV. If "VM" was intended to be a number, it's not standard.
Let's assume the question meant MCMXLV.
Step 1: Identify the Roman numeral values. M = 1000 C = 100 X = 10 L = 50 V = 5
Step 2: Apply the rules for combining Roman numerals. • CM: C (100) before M (1000) means . • XL: X (10) before L (50) means .
Step 3: Sum the values. .
The answer is:
Question 3: The square root of 4 is 2. Find the square root of 196.
Step 1: Understand what a square root is. The square root of a number is a number such that .
Step 2: Find the number that, when multiplied by itself, equals 196. We are looking for . We can test numbers:
The square root of 196 is 14.
The answer is:
Question 4: An examination started at 8:00am and lasted for 7 hours 30 minutes. When did it end?
Step 1: Add the hours to the start time. Start time: 8:00 am Duration: 7 hours 30 minutes Add 7 hours to 8:00 am: .
Step 2: Add the minutes to the new time. Add 30 minutes to 3:00 pm: .
The answer is:
Question 5: In a class of 59 pupils, there are 7 more boys than girls. How many boys are in that class?
Step 1: Set up equations based on the given information. Let be the number of boys and be the number of girls. Total pupils: Boys are 7 more than girls:
Step 2: Substitute the second equation into the first equation.
Step 3: Solve for .
Step 4: Solve for using the value of .
The answer is:
Question 6: Peter spent of his money on biscuits and of the rest on bananas. What fraction is left?
Step 1: Calculate the fraction spent on biscuits. Fraction spent on biscuits = .
Step 2: Calculate the remaining fraction after buying biscuits. Remaining fraction = .
Step 3: Calculate the fraction spent on bananas. Peter spent of the rest on bananas. Fraction spent on bananas = .
Step 4: Calculate the total fraction spent. Total fraction spent = Fraction on biscuits + Fraction on bananas Total fraction spent = To add these, find a common denominator, which is 8. Total fraction spent = .
Step 5: Calculate the fraction of money left. Fraction left = Fraction left = .
The answer is:
Question 7: If 21 students can weed a farm in 4 hours. How many students can weed the farm in hours?
Step 1: Understand the relationship between students and time. This is an inverse proportion problem: more students mean less time to complete the work. Let students, hours. Let be the unknown number of students, hours hours.
Step 2: Set up the inverse proportion equation.
Step 3: Substitute the known values and solve for .
The answer is:
Question 8: A man bought 80 eggs and discovered that 20 were bad. What percentage of the eggs was good?
Step 1: Calculate the number of good eggs. Total eggs = 80 Bad eggs = 20 Good eggs = Total eggs - Bad eggs = .
Step 2: Calculate the fraction of good eggs. Fraction of good eggs = .
Step 3: Convert the fraction to a percentage. Percentage of good eggs = Percentage of good eggs = Percentage of good eggs = Percentage of good eggs = Percentage of good eggs = .
The answer is:
Question 9: The distance round a square plot is 36m. What is the area of the plot?
Step 1: Understand the properties of a square. A square has four equal sides. The distance around a square plot is its perimeter. Perimeter of a square = .
Step 2: Calculate the length of one side of the square. Perimeter = 36 m .
Step 3: Calculate the area of the square plot. Area of a square = Area = Area = .
The answer is:
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Okay, let's tackle these math problems. Question 1: Numbers can be written in figures and in words.
This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.