NARRATOR: Yes, that is quite a hard sum. It might be easier if we separate the 17 into a 10 and a 7, and the 14 into a 10 and a 4. That gives us a 10, a 10, a 7 and a 4. Let's start by adding the ...

I probably could have guessed that. What an interesting shop. NARRATOR: That’s a good idea, Fin. Arrange your credits into stacks of 10 to make them easier to count. 1 stack of 10… 2 stacks of 10.

On Wednesday at 1pm, military analyst Professor Michael Clarke will answer your questions on the Ukraine war in his weekly live session. Send us yours in the form at the top of the page. 'Everything ...

Ukraine war latest: We have identified two suspects behind railway bombing, Poland says | Ukraine war latest Poland's prime minister says two Ukrainians who "collaborated" with Russian intelligence ...