Set 5
2. What is the missing value in this set of 7 numbers: 6, 6, 7, -, 8, 6, 8. Answer
3. Burnham's new car has a top speed of 140 mph so he felt safe in allowing for an average speed of 60 mph when planning the 210 mile motorway journey to his sister's wedding. However, in spite of the motorway speed limit being 70 mph, the first part of the journey was plagued by a number of traffic hold-ups and as he passed a motorway service station which he knew to be at the halfway point, Burnham was aghast to realise that so far he had averaged only 30 mph. Assuming he is not stopped for speeding, what is the average speed that Burnham must drive at for the rest of the trip if he is not to miss the wedding? Answer
4. If the world champion pork pie eater can eat 30 pork pies in an hour, how many can he eat in two hours? Answer
5. Bob Ankhamun, the builder, wants to build himself a tomb in the style of an Egyptian pyramid with walls having a 45 degree slope. As Bob doesn't like fractions, his plans require exactly 34 cubic metres of limestone. What will be the length of each side at the base? Answer
6. The planet Conica is home to the two races of Icons and Yukons. Both peoples are cone-shaped so, naturally, the doors to their houses are triangular in shape. Since the Icons are half as tall again as the Yukons, Yukon doors are proportionately shorter, although of equal width and thickness. If it takes the wood from 3 conifers to make 4 Icon doors, how many Yukon doors can be made from a dozen conifers. Answer
7. Jeweller Sam Gold devised a simple test for potential apprentices. They were given 10 apparently identical gold rings, nine of which weighed exactly the same as each other with the odd one weighing either very slightly less or very slightly more, and an accurate balance on which the rings could be weighed against each other. The test was to find the odd ring and say whether it was lighter or heavier than the others in the least number of weighings. What is the least number of weighings needed to achieve this? Answer
Tricky Teasers - Freakish Facts
Set 1 ~ Set 2 ~ Set 3 ~ Set 4 ~ Set 5
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