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Thought-Process to Discover Knowledge

Welcome to nubtrek.

Books and other education websites provide "matter-of-fact" knowledge. Instead, nubtrek provides a thought-process to discover knowledge.

In each of the topic, the outline of the thought-process, for that topic, is provided for learners and educators.

Read in the blogs more about the unique learning experience at nubtrek.continue

In this page, a simple overview of the divisibility test for `10` is provided.



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Which of the following are multiples of `10`?

  • `20,35,40,55, cdots`
  • `10,20,30,40,cdots`
  • `10,20,30,40,cdots`

The answer is "`10,20,30,40,cdots`"

Consider the multiples of `10` given as `10,20,30,40,cdots`. Is there any similarity observed in the multiples?

  • all have digit `0` in the units place
  • there is no similarity observed
  • there is no similarity observed

The answer is "all have digit `0` in the units place". That is, all are ending in `0`

Numbers with `0` in units place are divisible by `10`.

Consider the numbers `20` and `24`, which of these is divisible by `10`?

  • `24`
  • `20`
  • `20`

The answer is "`20`"

Test for Divisibility by `10` : If the digit in the units place is `0`, then the number is divisible by `10`.

Is `2008` divisible by `10`?

  • Yes
  • No
  • No

The answer is "No". Checking the digit in units place `8`, it is concluded that the number is not divisible by `10`.

Is `920` divisible by `10`?

  • Yes
  • Yes
  • No

The answer is "Yes". Checking the digit in units place `0`, it is concluded that the number is divisible by `10`.

                            
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