Olympiad Test: Numerals - 2 - Class 2 MCQ

Seventy-five means we have 70 and 5 more. The tens place is 7, which represents seventy, and the ones place is 5. So when we write it in digits, it becomes 75.

Expanded form shows the value of each digit separately. In 509:
5 is in the hundreds place → 5 × 100 = 500
0 is in the tens place → 0 × 10 = 0
9 is in the ones place → 9 × 1 = 9
So the expanded form is 500 + 0 + 9.

To compare 321 and 312, first look at the hundreds place: both have 3 → equal. Next, look at the tens place: 321 has 2 tens, 312 has 1 ten → 1 ten < 2 tens. So 312 is smaller than 321.

Descending order means arranging numbers from largest to smallest. First, the largest number is 89, then 67, then 45, and finally 23. So the descending order is 89, 67, 45, 23.

Ordinal numbers tell the position or rank of a person or thing. The first position is written as “1st” and read as “First”.

Roman numerals use letters to represent numbers. X = 10. To write 20, we combine two X’s → X + X = XX.

In Roman numerals, a smaller number before a larger number is subtracted. I = 1 comes before V = 5, so IV = 5 – 1 = 4.

Face value is simply the value of the digit itself without considering its position. The digit is 8, so the face value = 8.

Place value depends on the position of the digit. 8 is in the tens place → 8 × 10 = 80. So the place value of 8 is 80.

In Roman numerals, X = 10 and V = 5. To write 15, combine X + V → 10 + 5 = 15 → XV.