Any three digit number is formed by a combination of three digits.
For example 138 is a three digit number formed by the combination of 1, 3 and 8,
Another number that can be formed by 1, 3 and 8 are 183, 381, 318, 813 and 831.
All these numbers are different
138 = 1 hundred 3 tens and 8 ones.
183 = 1 hundred 8 tens and 3 ones
381 = 3 hundred 8 tens and 1 ones
318 = 3 hundred 1 tens and 8 ones
813 = 8 hundred 1 tens and 3 ones
831 = 8 hundred 3 tens and 1 ones
Illustration 1: The number formed by the three digit 1, 4 and 7 are ____________
A..135
B. 447
C. 417
D. 731
Answer: C
Solution:
From the options available only number 417 can be formed by the combination of digits 1, 4 and 7
Another number that can be formed by 1, 4 and 7 are 147, 174, 471, 714 and 741.
Hence the correct option is C
Illustration 2: The numbers 831 can be formed by _______________ digits.
A. 1, 2, 3
B. 2, 4, 6
C. 8, 8, 2
D. 8, 1, 3
Answer: D
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