A number is divisible by 10, if its units digit is zero.
Let ...cba be an arbitrary number whose ones digit is a, tens digit is b, hundreds digit is c and so on. Then,
is divisible by 10 if and only if a = 0.
is divisible by 10 if and only if its units digit is 0.
It follows from the above discussion that a number is divisible by 10 if and only if its units digit is zero.
Hence the Test of Divisibility By 10 that is a number is divisible by 10, if its units digit is zero is justified
Illustration 1: Write 231 in the form 10b + a then check its divisibility by 10
Solution: We will express 231 in the form 10b + a
where a = 1 and b = 23.
The number 231 will leave a remainder 1 when divided by 10 because the digit at the unit place represented by a in general form is 1.
Which of the following numbers are divisible by 10 ? 2459652, 6544790, 15649645, 14646940, 12548448, 548784, 4586780 | |||
Right Option : C | |||
View Explanation |
Which of the following number is divisible by 10 ? 35246, 57465,67457,46571,47563 | |||
Right Option : D | |||
View Explanation |
The value of literal b is ______ when 735 in the form 10b + a. | |||
Right Option : B | |||
View Explanation |
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