Knowing Our Num...

The bacterial growth in a dirty area is 4,53,78,967. After cleaning, it becomes 54,53,734. Find the number of bacteria that were killed.

4,53,578 toys were made in a day in a factory and 4,357 were sold from the factory outlet. The next day, 758 more toys were made and 8,427 were sold. What is the number of toys left in the factory?

Total number of questions made in a content company per day is 1,125. Assume that the company workers had to work all days, excluding 4 Sundays in each month. What is the total number of questions made in the months of March, April and July altogether? (Assume that all the given months have 4 Sundays)

Rakesh did a multiplication sum of 253 × 17 and got the answer. He suddenly realised that the question given by teacher was 253 × 71. So, what will be the difference between his answer and the required answer?

(i) The number 456,785 nearest ten thousand is rounded off to P .
(ii) Estimated product of 5023 and 218 is Q .
(iii) MMXVIII is written in the Hindu-Arabic numeral as R .

The difference in the place values of 6 between the greatest and the smallest 4-digit numbers formed by using the digits 6, 7, 8 and 9 each only once is

State 'T for true and 'F' for false.

I. Rounding 4,560 to the nearest thousand, we get 4,000.
II. Place value of 4 in 5,45,67,537 is four crore.
III. 1 lakh = 100 thousand
IV. Roman numeral for the largest two digit number is L.

If a new number is formed by interchanging the tens and thousands place digits of 12,345, then what is the relation between them?

(A) New number is greater than the original number.
(B) New number is smaller than the original number.
(C) New number is equal to the original number.
(D) Cannot be determined