Question

Determine which of the following numbers are divisible by 5 and by 10.
25, 125, 250, 1250, 10205, 70985, 45880​

Answer 1

Answer:

We know that

If the unit digit of a number is 5 or 0, it is divisible by 5

If the unit digit of a number is 0, it is divisible by 10

If the unit digit of a number is an even number, it is divisible by 2

Now, investigate for the given numbers.

25= Here, unit digit is 5, so it is divisible by 5 only

225= Here, unit digit is 5, so it is divisible by 5 only

250= Here, the unit digit is 0, so the number is divisible by 5,10 and 2

1250= Here, the unit digit is 0, so the number is divisible by 5,10 and 2

10205= Here, unit digit is 5, so it is divisible by 5 only

70985= Here, unit digit is 5, so it is divisible by 5 only

45880= Here, the unit digit is 0, so the number is divisible by 5,10 and 2

Answer 2

Answer:

250, 1250, 45880

Step-by-step explanation:

divisibility rule for 5 : last digit must be 5 or 0

divisibility rule for 10 : last digit must be 0

so, 250, 1250, 45880 are divisible by both 5 & 10.

the numbers 25, 125, 10205, 70985 are divisible by 5 only