I add five to nine, and get two. The answer is correct, but how? When it is 9am, add 5 hours to it and you will get 2pm.
What number should replace the question mark? 78214 : 292 38421 : 459 69517 : ? 586:answer 69 + 517 = 586;
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A man has 53 socks in his drawer: 21 identical blue, 15 identical black and 17 identical red. The lights are fused and he is completely in the dark. How many socks must he take out to make 100 per cent certain he has a pair of black socks? 40 socks. If he takes out 38 socks, although it is very unlikely, it is possible they could all be blue and red. To make 100 per cent certain that he also has a pair of black socks he must take out a further two socks;
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