Challenge link

Riddles, one at a time

Beads 8 to 19 are not shown. The pattern red, green, blue repeats. What colour is bead 20?

Video · Easy Challenge link
Answer

Green

20 = 6 × 3 + 2: bead 20 is the 2nd colour, green.

Twelve Glowing Dots

How many squares can you make by joining 4 dots?

Picture · Genius Challenge link
Answer

11

5 upright squares and 6 tilted ones.

Which number is the BIGGEST?

Video · Easy Challenge link
Answer

CX

XC = 90, LX = 60, CX = 110, XL = 40. CX wins.

What day of the week is the 1st?

Video · Expert Challenge link
Answer

Friday

31 days = 4 weeks + 3 days, and those 3 extra days start the month: Friday, Saturday, Sunday.

Stack the Stones

Which number belongs on the top brick?

Picture · Easy Challenge link
Answer

44

20 - 9 = 11, 13 + 11 = 24, then 24 + 20 = 44.

Colours mix like paint. Which door does the beam light, and in what colour?

Video · Hard Challenge link
Answer

D, ORANGE

Mirrors turn it; red and yellow panes make orange.

Challenge link