1. How many millimeters make one kilometer?(a) 1000​(b) 10,000​(c) 100,000​(d) 10,00,0002. A box contains 500000 medicine tablets each weghinh 10 mg. what is the total weight of all the tablets in the box in kilograms?(a) 5,00,000​(b) 50,000​(c) 5kg​(d) 500kg3. What is the difference between the greatest and the least number that can be written using the digits6, 2,7,4,3, each only once?(a) 50000​(b) 52965​(c) 52865​(d) 519654. In the international system of numeration we can write One billion as:(a) 1 crore​(b) 10 crore​(c) 100 crore​(d) 1000 crore5. Estimation of the quotient 86 ÷ 9 to nearest 10:(b) 90​(b)10​(c)80​(d) none of these6. When 1787 is rounded off to nearest tens, we get:(a) 1790​(b) 1780​(c) 1700​(d)18007. The sum of the number 765432 and the number obtained by reversing its digit is:(a) 930865​(b) 980356​(c) 999999​(d) 99999988. The expanded form for 308927 is:(a) 3000000 + 8000 + 900 + 20 + 7​(b) 300000 + 800 + 90 + 2 + 7(c) 30000 + 80000 + 9000 + 20 + 7​(d) 300000 + 8000 + 900 + 20 + 79. Estimate 734+998 by rounding off the nearest tens:(a) 1730​(b) 1740​(c) 1750​(d) 176010. The difference between the face value and place value of 4 in 2416 is:(a) 404​(b) 396​(c) 3000​(d) 299611. Use the given digits and without repetition make the greatest and smallest 4-digit. numbers. (a) 2, 8, 7, 4 (b) 9, 7, 4, 1 (c) 4, 7, 5, 0 (d) 1, 7, 6, 2 (e) 5, 4, 0, 312. Population of Agra and Aligarh districts in the year 2001 was 36,20, 436 and 29,92,286, respectively. What was the total population of the two districts in that year?13. Estimate the product 5981 × 4428 by rounding off each number to the nearest(i) tens (ii) hundreds (iii) thousands. If you will make it so I will mark you brainliest.