1. Finn, 7, asks: how many teeth does a caiman have?

   1. They don’t have teeth

   2. Between 64 and 68 – twice as many as humans

   3. Between 72 and 76

   4. It’s too dangerous to count them!

2. Shakira, 6, asks: how many different types of plants are there in the world?

   1. 390

   2. 3,900

   3. 391,000

   4. 39 million

3. Robyn, 7, asks: why do cats purr?

   1. To encourage others to care for and nurture them

   2. To signal they don’t pose a threat

   3. To soothe themselves when in pain or anxious

   4. Experts aren’t sure – it’s probably all the above

4. Rowan, 7, asks: how many houses are there in the world?

   1. About 3.2 million – the same as the number of people in Wales

   2. About 28 million – the same as the number of people in Australia

   3. About 2.2 billion – the same as the possible number of stars in the Milky Way

   4. About 23 billion – more than twice the number of the world’s population

5. Daniel, 8, asks: are everyone’s taste buds different?

   1. Taste buds don’t exist

   2. Yes, everyone has unique taste buds

   3. No, all taste buds are more or less the same

   4. We’re born with different taste buds but they end up the same as we grow up

Solutions

1:C - Caimans are closely related to alligators, but their snouts are not as wide. The black caiman is the largest caiman, and they have between 72 and 76 teeth in total. , 2:C - A 2016 report by the Royal Botanical Gardens at Kew in 2016 estimated that there are 391,000 plants known to science. Most of these are flowering plants., 3:D - Experts aren’t completely sure, but the main reason cats purr seems to be to receive comfort and nurture from others. They can also purr when distressed or in pain, or to signal peaceful intentions to other animals., 4:C - It’s hard to work out the number of houses! But if you take the definition of a house as being an independent living place for a single household, then the United Nations estimates that there are 2.2 billion households in the world., 5:B - Tastes buds are determined by genetics, and everyone’s genetics are unique. The number of flavour receptors we have in our taste buds varies from person to person, so this means we might all taste the same food differently.

Scores

1. 5 and above.

2. 4 and above.

3. 3 and above.

4. 2 and above.

5. 0 and above.

6. 1 and above.