Here are the answers to our weekly brain teasers:

Week starting 26 May

1) 80 percent

2) Meranti

3) Weekly, and in water hotter than 55 degrees C. Dry-cleaning will kill dust mites but won't remove allergens they produce.

Week starting 19 May

1) Between 5 cm and 8.5cm width

2) Tulip. The red tuplip signifies a declaration of love; a variegated symbolises beautiful eyes, while the yellow tulip suggests hopeless love and can be sent to an unwanted admirer.

3) Every 12-18 months

Week starting 12 May

1) Coco Chanel

2) Medium density fibreboard

3) The ceiling. Any paint spatters that land on the wall can then be painted over.

Week starting 5 May

1) Parrot flower. Its bract (modified leaves which mask an insignificant flower) can be red, yellow or orange.

2) 400. Thread count is the number of threads per inch, so the higher the number, the finer the fabric, resulting in a softer finish.

3) Easter Saturday of the long weekend.

Week starting 28 April

1) Vicuna, which is closely related to the llama. Each strand is less than half the diameter of the finest sheep's wool, which means its fleece is amazingly fine and soft.

2) 16:9 

3) A quilt is traditionally a sandwich of 3 layers. Top, decorative fabric; middle, wadding; bottom, calico or cotton.