Challenge link

Riddles, one at a time

A straight 15 m fence has a post every 3 m, with one at each end. How many posts are there?

Video · Easy Challenge link
Answer

6

15 ÷ 3 = 5 gaps, and 5 gaps need 6 posts.

Full explanation on the blog

How many more km until the next mirror number?

Video · Medium Challenge link
Answer

11 km

The next mirror number is 30003, just 11 km on.

Which card completes the grid?

Video · Genius Challenge link
Answer

D

In each row, only lines on both cards stay. Row 3 gives card D.

Which pattern appears when it is opened?

Video · Hard Challenge link
Answer

D

Each fold mirrors the holes across its crease.

What comes next? 2, 6, 12, 20, 30, ?

Text · Easy Challenge link
Answer

42

The gaps grow by two each time: +4, +6, +8, +10, then +12. 30 + 12 = 42.

One Word, Three Pairs

One word fits all three gaps. What is it?

Picture · Medium Challenge link
Answer

WORK

Firework, workshop, homework, workout, network, workbook.

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