1.Use the given digits without repetition and 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, 3 (Hint : 0754 is a 4-digit number.)
"O" HASBEEN A VALUE...
(a)2,8,7,4 =small to big 2,4,7,8
=big to small 8,7,4,2
(b)9,7,4,1=small to big 1,4,7,9
=big to small 9,7,4,1
(c)4,7,5,0 =small to big 7,5,4,0
=big to small 0,4,5,7
(d)1,7,6,2=small to big 7,6,2,1
=big to small 1,2,6,7
2. Now make the greatest and the smallest 4-digit numbers by using any one digit twice.
(a) 3, 8, 7 (b) 9, 0, 5 (c) 0, 4, 9 (d) 8, 5, 1 (Hint : Think in each case which digit will you use twice.)
(a)3,3,8,7 =small to big 3,3,7,8
big to small 8,7,3,3
(b)9,0,5,0 =small to big 0,0,5,9
=big to small 9,5,0,0
(c)0,4,9,4 =small to big 0,4,4,9
=big to small 9,4,0,0
(d)8,5,1,1=small to big 1,1,5,8
=big to small 8,5,1,1
3. Make the greatest and the smallest 4-digit numbers using any four different digits with conditions as given.
(a) Digit 7 is always at Greatest ones place Smallest (Note, the number cannot begin with the digit 0. Why?)
1,5,8,9= big to small 9,8,5,1
(b) Digit 4 is always Greatest at tens place Smallest
(c) Digit 9 is always at Greatest hundreds place Smallest
(d) Digit 1 is always at Greatest thousands place Smallest
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