Introduction

• Your mission is to determine how many baskets that contained a mango, by doing some elimination.
• Try solving the problem first with only your brain – no use of pen and paper, or other aid.
• Good luck!

Exercise

Eighteen baskets of fruit were laid out for sale in a shop and each bore a unique number, 1 to 18 inclusive. All of the odd-numbered baskets held apples and no pears – and all of the even-numbered baskets held pears and no apples.

Any basket with a number lower than 9 held strawberries but no cherries – and any basket numbered 9 or higher held cherries but no strawberries. Any basket numbered 13 or lower held bananas but no apricots – and any basket numbered 14 or higher held apricots but no bananas.

A pineapple was placed into those baskets with both pears and bananas, as well as those baskets with both cherries and bananas, plus those with both apples and apricots – and a mango was placed into all of the remaining baskets.

How many baskets contained a mango?

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Introduction

• Your mission is to determine how many kids that painted a green star, by doing some elimination.
• Try solving the problem first with only your brain – no use of pen and paper, or other aid.
• Good luck!

Exercise

Fourteen children (half of whom are boys and half girls) drew a shape and painted it. Five of the boys are eight years old, as are two of the girls. Of the remaining children, one boy and three girls are nine years old and all of the others are ten years of age.

Three of the boys aged eight and half of the girls aged eight painted blue squares. Of those remaining, red circles were painted by one-third of the nine-year-old girls and half of the eight-year-old boys. Of those remaining, any ten-year-old painted a yellow triangle. The rest of the children painted a green star.

How many painted a green star?

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