Puz­zles

Virgin Australia Voyeur - - NEWS -

A crossword, su­dokus, quizzes and more.

1. You have a bag con­tain­ing 24 un­paired socks; ten black socks, eight red socks and six white socks. With­out look­ing, how many socks do you need to pull out of the bag to be cer­tain of hav­ing a match­ing pair?

2. Six test tubes are ar­ranged in a rack and num­bered 1–6. Tubes 1, 2 and 3 con­tain a chem­i­cal so­lu­tion. Tubes 4, 5 and 6 are empty. Touch­ing only one test tube, how can you ar­range them so that they al­ter­nate be­tween full and empty?

3. A car’s odome­ter shows that it has cov­ered 15951 km — a palin­dromic num­ber! At what speed do you need to travel for the next palin­dromic read­ing to be reached in two hours?

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