Riddles, one at a time

Nine Glass Lanterns

Which ONE tap lights all nine tiles?

Video · Medium Challenge link
Answer

D

Tapping D flips A, D, G and E: all nine shine.

Sara, Lina and Huda each have one fruit: an apple, a date and a fig. Sara's fruit has five letters. Lina's fruit is not a fig. Which fruit does Huda have?

The Three Fruits

Text · Easy Challenge link
Answer

Fig

Apple is the only five-letter fruit, so Sara has it. Lina can't have the fig, so she has the date, which leaves the fig for Huda.

Full explanation on the blog

Lemon, Tea and Dates

Lemon, Tea and Dates

What is the answer to the last line?

Picture · Medium Challenge link
Answer

25

Lemon 10, cup 5, date 2. Multiply first: 5 + 20 = 25.

Fewest Tokens: Pay 6

Which tokens pay 6 with the fewest tokens?

Video · Medium Challenge link
Answer

3 + 3

Just 2 tokens. Biggest first, 4 + 1 + 1, needs 3.

A melon weighs 2 kg plus one third of its own weight. How much does the melon weigh?

The Melon

Text · Easy Challenge link
Answer

3 KG

The 2 kg must be the other two thirds, so one third is 1 kg and the melon is 3 kg.

Full explanation on the blog

Crack the Lock

Crack the Lock

Which 3-digit code opens the lock?

Picture · Hard Challenge link
Answer

738

3 sits in the middle, 8 stays last, 7 goes first.

Full explanation on the blog

Challenge link