Are you most likely to bump into a bonny one-year-old child, a sprightly 69-year-old woman or a gorgeous 30-something man if you are taking a walk around your neighbourhood in Cheshire West and Chester?
With our exclusive gadget, you just input your postcode and all will be revealed.
Population figures from the Office for National Statistics don't just tell us how many people live in each part of the UK - but also their ages, and whether they are men or women.
Across the country as a whole we know there are 32,803,146 females of all ages, and 31,793,606 males.
The most common age for a woman is 49 and there are a total of 480,520 females of that age in the UK. The most common age for a man is also 49 (with a total of 465,864 of those).
Overall, then, as you wander around Britain you are most likely to meet a 49-year-old woman.
The picture, however, varies wildly in different parts of the country.
In Rotherham and Barnsley in Yorkshire - and Barking and Dagenham in London - you are actually most likely to meet a one-year-old boy whereas In Pembrokeshire in Wales you are most likely to meet a 67-year-old woman.