Page 249 - Math Genius C4

E:\Working\Orange_Education\Math_Genius_4\Open_Files\Answer
\ 03-Oct-2025 Bharat arora P-9 Reader’s Sign _______________________ Date __________

Answers

Chapter 1. Large Numbers Challenge Question (Page 18)
Let’s ReCaLL False
Practice time 1C
1. (a) Four thousand three hundred seventy-nine
(b) Eight thousand nine hundred 1. (a) < (b) < (c) > (d) <
(c) Seven thousand one hundred fifty-nine 2. (a) Greatest no.: 87,856 Smallest no.: 38,857
(d) Nine thousand nine hundred ninety-nine (b) Greatest no.: 4,88,332 Smallest no.: 45,657
2. (a) 3720 (b) 5862 (c) 8088 (d) 5009 (c) Greatest no.: 6,45,562 Smallest no.: 6,45,172
3. (a) 300 (b) 0 (c) 6688 (d) 6,6,7,4 (e) 6236 (d) Greatest no.: 5,78,960 Smallest no.: 5,68,960
3. (a) 27,656 < 27,895 < 75,690 < 88,975
Practice time 1a (b) 39,850 < 39,856 < 39,876 < 49,560
1. Lakhs (L) ten thousand thousands Hundreds tens Ones (O) (c) 26,565 < 2,56,561 < 2,56,563 < 2,56,567
(100000) (tth) (10000) (th) (1000) (H) (100) (t) (10) (1)
(a) 3 7 0 3 6 (d) 17,654 < 3,76,946 < 6,76,546 < 8,56,565
(b) 4 3 6 4 5 4. (a) 42,560 > 42,206 > 42,105 > 42,103
(c) 3 8 6 4 4 9 (b) 68,987 > 68,978 > 68,968 > 68,960
(d) 6 4 0 3 9 6 (c) 7,79,568 > 7,79,567 > 7,59,678 > 7,59,576
2. (a) 36413 (b) 43098 (c) 490223 (d) 704089 (d) 9,99,999 > 9,96,999 > 9,89,999 > 9,83,456
3. (a) 32,064; Thirty-two thousand sixty-four Practice time 1D
(b) 36,379; Thirty-six thousand three hundred seventy-nine 1. Digits Greatest number smallest number
(c) 94,008; Ninety-four thousand eight (a) 2,7,3,5,1 75,321 12,357
(d) 27,114; Twenty-seven thousand one hundred fourteen (b) 7,5,4,8,0 87,540 40,578
(e) 4,13,066; Four lakh thirteen thousand sixty-six (c) 9,8,3,0,2,6 9,86,320 2,03,689
(f) 7,36,395; Seven lakh thirty-six thousand three hundred ninety-five (d) 0,1,9,6,3,7 9,76,310 1,03,679
(g) 4,49,078; Four lakh forty-nine thousand seventy-eight 2. Digits Greatest 5-digit number smallest 5-digit number
(h) 2,57,141; Two lakh fifty-seven thousand one hundred forty-one (a) 5, 8, 3, 4 88,543 33,458
5. (a) 52,483; Fifty-two thousand four hundred eighty-three (b) 6,0,7 77,760 60,007
(b) 60,135; Sixty thousand one hundred thirty-five (c) 2,7,8 88,872 22,278
(c) 5,42,638; Five lakh forty-two thousand six hundred thirty-eight (d) 9,6,0 99,960 60,009
6. (a) 56,202; 56,203; 56,204; 56,205; 56,206; 56,207; 56,208; 56,209; (e) 5,0 55,550 50,000
56,210; 56,211; 56,212; 56,213; 56,214; 56,215; 56,216; 56,217; 3. Digits Greatest 6-digit number smallest 6-digit number
56,218 (a) 1,9,7,5,0 9,97,510 1,00,579
(b) 44,445; 44,446; 44,447; 44,448; 44,449; 44,450; 44,451; 44,452; (b) 2,4,6,8 8,88,642 2,22,468
9,99,730
3,7,0,9
(c)
3,00,079
44,453; 44,454; 44,455; 44,456; 44,457; 44,458; 44,459 (d) 6,8,9 9,99,986 6,66,689
(c) 29,057; 29,058; 29,059; 29,060; 29,061; 29,062; 29,063; 29,064 (e) 4,7 7,77,774 4,44,447
(d) 53,496; 53,497; 53,498; 53,499; 53,500; 53,501; 53,502; 53,503; Challenge Question (Page 23)
53,504; 53,505; 53,506; 53,507; 53,508; 53,509 3,81,850 – 3,81,949
7. (b), (d)
Practice time 1e
Challenge Question (Page 16)
1. (a) 840 (b) 790 (c) 1000 (d) 3270
99999
(e) 7550 (f) 9050 (g) 10,200 (h) 14,560
think tank (Page 16) 2. (a) 2800 (b) 4600 (c) 5100 (d) 9400
1. 1,00,000 2. 6 (e) 7500 (f) 14,700 (g) 32,200 (h) 43,600
Practice time 1B 3. (a) 23,000 (b) 44,000 (c) 60,000 (d) 1,24,000
(e) 3,46,000 (f) 9,86,000 (g) 7,54,000 (h) 8,33,000
1. (a) 900 (b) 70,000 (c) 7000 (d) 0 (e) 4,00,000 (f) 0
2. (a) 47,889 = 40,000 + 7000 + 800 + 80 + 9 Challenge Question (Page 25)
(b) 80,791 = 80,000 + 700 + 90 + 1 L
(c) 5,78,914 = 5,00,000 + 70,000 + 8000 + 900 + 10 +4 Practice time 1F
(d) 8,00,450 = 8,00,000 + 400 + 50 1. (a) VIII (b) XVIII (c) XXV (d) XXIX (e) XCV
3. (a) 3,08,960 (b) 1,43,629 (c) 8,75,402 (f) C (g) CXLIX (h) CCLIX (i) CCCLXIV (j) CCCLXIX
4. (a) 34,363, 34,365 (b) 73,647, 73,649 (c) 1,11,42, 11,144 2. (a) 29 (b) 42 (c) 49 (d) 98 (e) 84
(d) 8,40,067, 8,40,069 (e) 1,54,835, 1,54,837 (f) 157 (g) 251 (h) 305 (i) 335 (j) 358
(f) 1,99,998, 2,00,000 3. (a) 19 (b) 3 (c) 19 (d) 36
5. (a) 60,006 (b) 39,996 4. (a) XXII (b) XLIX (c) CL (d) CC

Mathematics-4 247