EXERCISE 1A
5. Arrange the following numbers in ascending order.
26893, 262447, 262156, 263739
Solution- 26893 < 262156 < 262447 < 263739
6. Arrange the following numbers in descending order.
92693, 92627, 926216, 9263739, 92637, 926371
Sol. 9263739 > 926371 > 926216 > 92693 > 92637 > 92627
7. Form numbers without repeating digits and by using all the given digits.
Digits Greatest number Smallest number
a) 7,1 71 17
b)5,0,9 950 509
c)4,2,3,8 8432 2348
d)1,0,9,3,6 96310 10369
e)3,0,9,4,7,1 974310 103479
8. Form the greatest and the smallest 4-digit numbers (repetition of digits is allowed) based on the following conditions.
a. The number is an even number.
Sol. greatest no.- 9998
smallest no.- 1000
b. The number is an odd number.
Sol. greatest no. - 9999
smallest no.- 1001
c. The number is divisible by 3.
Sol. greatest no. - 9999
smallest no.- 1002
d. The greatest digit used is 5.
Sol. greatest no.- 5555
smallest no.- 1000
e. The smallest digit used is 3.
Sol. greatest no.- 9999
smallest no. 3333
f. Each digit is repeated twice.
Sol. greatest no.- 9988
smallest no. - 1001
g. The sum of the digits is 8.
Sol. greatest no.- 8000 (8+0+0+0=8)
smallest no. - 1007 (1+0+0+7=8)
h. The product of the digits is 8.
Sol. greatest no.- 8111 (8x1x1x1=8)
smallest no. - 1118 (1x1x1x8=8)
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