Question

One number is divisible by another if the second can go into the first with no remainder. For example, 12 is divisible by 2 (2 goes in 6 times with no remainder), but 12 is not divisible by 5 (5 goes in with a remainder of 2)

The expectation for this quiz is that you will be able to solve all of the divisibility problems without using a calculator or computer. Instead the intent here is to see how well you are at thinking about the ideas.

So keep Python IDLE closed, and avoid the temptation to pull out your calculator for any of this activity today.

So, for a starter, which of these values is divisible by 10?

a) 59386736533

b) 63631573154

c) 61956156838

d) 38612651250

Answer 1

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any number is divisible by 10 when there are at least 1 tailing 0 in the number

ex 1234 doesn't have any tailing 0

12340 is divisible by 10

234900 is divisible by 10

so option d