Q: How many lakhs are there in 1 million?

1 Million = 1,000,000. 1 Lakh = 100,000.\nTherefore, 1 Million = 10 lakhs.

Q: How is the number 73 written in Roman numerals?

73 can be expanded as 50 + 10 + 10 + 3.\nIn Roman numerals, 50 = L, 10 = X, and 3 = III.\nSo, 73 = LXXIII.

Q: Estimate the sum of 730 + 998 by rounding off to the nearest hundreds using the general rule.

Rounding off 730 to nearest hundred = 700.\nRounding off 998 to nearest hundred = 1000.\nEstimated sum = 700 + 1000 = 1700.

Question 1

Which of the following is the greatest number among 9235, 9253, 9523, and 9325?

Accepted Answer

Comparing the thousands digit, all numbers have 9. Comparing the hundreds digit, 9523 has 5 which is the greatest. Therefore, 9523 is the greatest number.

Question 2

What is the smallest 4-digit number that can be formed using the digits 4, 0, 3, and 7 without repeating any digit?

Accepted Answer

To form the smallest 4-digit number, we place the smallest non-zero digit (3) at the thousands place, followed by 0, then 4, and then 7. Thus, the number is 3047.

Question 3

How many lakhs are there in 1 million?

Accepted Answer

1 Million = 1,000,000. 1 Lakh = 100,000.
Therefore, 1 Million = 10 lakhs.

Question 4

How is the number 73 written in Roman numerals?

Accepted Answer

73 can be expanded as 50 + 10 + 10 + 3.
In Roman numerals, 50 = L, 10 = X, and 3 = III.
So, 73 = LXXIII.

Question 5

Estimate the sum of 730 + 998 by rounding off to the nearest hundreds using the general rule.

Accepted Answer

Rounding off 730 to nearest hundred = 700.
Rounding off 998 to nearest hundred = 1000.
Estimated sum = 700 + 1000 = 1700.

Knowing Our Numbers