7. Any number is divisible by 5 if it has _____ at unit place?
a) 2 or 5
b) 0 or 5
c) Even Number
d) 0 or 2
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Answer:
option ( B ) is the answer (0or5)
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Any number is divisible by 5 if it has 0 or 5 at unit place.
- All the multiples of 5 end in either 0 or 5( alternatively). For example:
5×1= 5, 5×2=10, 5×3 = 15, and so on.
- Similarly, multiples of 2 end in an even number.
Example: 2,4,6,8,10, 12, and so on.
- Similarly, for a number to be divisible by 3, the sum of all the digits should be divisible by 3.
For example: 85203
The sum of all the digits is 18 which is divisible by 3.
- In this way, we have divisibility rule for most of the numbers.
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