In the worksheet on forming numbers with digits, the questions will help us to practice how to form different types of smallest and greatest numbers using different digits. We know that all the numbers are formed with the digits 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9.
1. Which is the greatest onedigit number among 3, 9, 7, 8, 6.
2. Write the twodigit numbers formed with each of the following two digits:
(i) 4, 7
(ii) 9, 2
(iii) 1, 6
(iv) 7, 8
3. Form 3digit numbers as many you can with the help of the given three digits. No digit should be repeated in any of the formed numbers.
(i) 3, 4, 7
(ii) 5, 0, 9
(iii) 1, 9, 5
4. Write both the (a) smallest 3digit number and (b) greatest 3digit number (without repeating a digit) from the following 3 digits.
(i) 1, 3, 5
(ii) 2, 6, 4
(iii) 5, 9, 0
(iv) 7, 0, 8
5. Write the greatest 3digit number with the help of the given 3 digits. No digit should be repeated in a number.
(i) 5, 8, 6
(ii) 2, 7, 0
(iii) 4, 7, 3
(iv) 6, 0, 8
6. Write the smallest 2digit number and greatest 2digit number (without repeating a digit) by taking two digits from the given digits:
(i) 4, 8, 7
(ii) 3, 0, 8
(iii) 7, 9, 3
(iv) 3, 4, 0
(v) 6, 3, 5
(vi) 6, 7, 1
7. Write the smallest 4digit number and the greatest 4digit number (without repeating a digit) from each of the following groups of four digits:
(i) 4, 7, 2, 9
(ii) 3, 6, 2, 4
(iii) 8, 3, 0, 1
(iv) 5, 1, 7, 3
8. Write the smallest 3digit number and the greatest 3digit number (without repeating a digit) by taking three digits from the following:
(i) 4, 1, 3, 6
(ii) 9, 3, 2, 5
(iii) 4, 8, 7, 6
(iv) 5, 0, 3, 9
(v) 3, 7, 0, 0
9. Write the smallest number by changing the position of digits of the given 3digit numbers.
(i) 315
(ii) 471
(iii) 476
(iv) 339
(v) 270
(vi) 773
(vii) 544
(viii) 705
10. Write the smallest 3digit number with the help of the given 3 digits. No digit should be repeated in a number.
(i) 5, 1, 7
(ii) 2, 1, 0
(iii) 4, 1, 3
(iv) 9, 0, 8
Answers for the worksheet on forming numbers with digits are given below to check the exact answers of the above problems.
Answers:
1. 9
2. (i) 47, 74
(ii) 92, 29
(iii) 16, 61
(iv) 78, 87
3. (i) 347, 437, 734, 374, 473, 743
(ii) 509, 905, 590, 950, 059, 095
(iii) 195, 915, 519, 159, 951, 591
4. (i) smallest number: 135; greatest number: 531
(ii) smallest number: 246; greatest number: 642
(iii) smallest number: 509; greatest number: 950
(iv) smallest number: 708; greatest number: 870
5. (i) 865
(ii) 720
(iii) 743
(iv) 860
6. (i) smallest number: 47; greatest number: 87
(ii) smallest number: 30; greatest number: 83
(iii) smallest number: 37; greatest number: 97
(iv) smallest number: 30; greatest number: 43
(v) smallest number: 35; greatest number: 65
(vi) smallest number: 16; greatest number: 76
7. (i) smallest number: 2479; greatest number: 9742
(ii) smallest number: 2346; greatest number: 6432
(iii) smallest number: 1038; greatest number: 8310
(iv) smallest number: 1357; greatest number: 7531
8. (i) smallest number: 134; greatest number: 643
(ii) smallest number: 235; greatest number: 953
(iii) smallest number: 467; greatest number: 876
(iv) smallest number: 305; greatest number: 953
(v) smallest number: 300; greatest number: 730
9. (i) 135
(ii) 147
(iii) 467
(iv) 339
(v) 207
(vi) 377
(vii) 445
(viii) 507
10. (i) 175
(ii) 102
(iii) 134
(iv) 809
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