Is 348 divisible by 2 Easy

The question

Question: is 348 divisible by 2?

Divisible means it goes in exactly, with nothing left over.

1 Look at the last digit

348 is 34 tens and 8.

2 goes into 10, so into every ten.

Only the last digit is left to check.

For 2: is it even: 0, 2, 4, 6 or 8?

The last digit is 8.

So yes.

2 Write the answer

So 348 is divisible by 2.

3 Check

Let's check by dividing.

348 divided by 2 is 174, nothing left over.

The tests were right!

Let's look back.

First: look at the last digit.

Then: write the answer.

Last: check.

▶ Watch it solved

Is 2,736 divisible by 9 Medium

The question

Question: is 2736 divisible by 9?

Divisible means it goes in exactly, with nothing left over.

1 Add the digits

We add the digits: 2 + 7 + 3 + 6 is 18.

Why add the digits?

Each ten is 9 and 1 more.

Each hundred is 99 and 1 more.

3 and 9 go into the 9s and 99s.

What is left over is the sum of the digits.

For 9: 18 divided by 9 is 2, nothing left over.

So 9 goes into 2736.

2 Write the answer

So 2736 is divisible by 9.

3 Check

Let's check by dividing.

2736 divided by 9 is 304, nothing left over.

The tests were right!

Let's look back.

First: add the digits.

Then: write the answer.

Last: check.

▶ Watch it solved

Is 1290 divisible by 2, 3, 4, 5, 6, 9 and 10 Harder

The question

Question: is 1290 divisible by 2, 3, 4, 5, 6, 9 and 10?

Divisible means it goes in exactly, with nothing left over.

1 Look at the last digit

1290 is 129 tens and 0.

2, 5 and 10 all go into 10, so into every ten.

Only the last digit is left to check.

For 2: is it even: 0, 2, 4, 6 or 8?

The last digit is 0.

So yes.

For 5: is it 0 or 5?

The last digit is 0.

So yes.

For 10: is it 0?

The last digit is 0.

So yes.

2 Look at the last two digits

100 is 4 times 25.

So 4 goes into every hundred.

Only the last two digits are left: 90.

90 divided by 4 is 22, with 2 left over.

So no.

Careful!

Even is not enough for 4.

1290 is even, but 4 does not go into 90.

3 Add the digits

We add the digits: 1 + 2 + 9 + 0 is 12.

Why add the digits?

Each ten is 9 and 1 more.

Each hundred is 99 and 1 more.

3 and 9 go into the 9s and 99s.

What is left over is the sum of the digits.

For 3: 12 divided by 3 is 4, nothing left over.

So 3 goes into 1290.

For 9: 12 divided by 9 is 1, with 3 left over.

So 9 does not go into 1290.

4 Use 2 and 3

6 is 2 times 3.

So 6 goes in only when 2 and 3 both go in.

Both do.

So yes.

5 Write the answer

So 1290 is divisible by 2, 3, 5, 6 and 10.

Not by 4 or 9.

6 Check

Let's check by dividing.

1290 divided by 2 is 645, nothing left over.

Every yes divides exactly, and 4 leaves 2 over.

The tests were right!

Let's look back.

First: look at the last digit.

Then: look at the last two digits.

Then: add the digits.

Then: use 2 and 3.

Then: write the answer.

Last: check.

▶ Watch it solved