To get 31 using the numbers 1, 2, 6, and 7, you can use the following equation: (6 * 2) + 7 + 1 = 31. This equation follows the order of operations (multiplication before addition) to reach the desired result. By multiplying 6 and 2 first, then adding 7, and finally adding 1, you can achieve the target number of 31.
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It depends on how you do it. 1) ((7+24)/6)*2 7+24 = 31 31/6=5.166666667 5.166666667*2=10.333333333 2) 7+((24/6)*2) 24/6=4 4*2=8 8+7=15 3) (7+24) / (6*2) 7+24=31 6*2= 12 31/12= 2.583333333 The normal way would be method (2) which follows the rule of first dividing then multiplying then adding. However when writing out a sum to do it is important to use brackets to make the order in which mathematical operations are to be performed clear because, as you can see, it does affect the result.
The answer is 6 / (1-5/7). 1- 5/7 = 2/7 6 / (2/7) = 6 * (7/2) = (6*7)/2 = 42/2 = 21. Simples!
62 because... 6+1=7 7x2=14 14+1=15 15x2=30 30+1=31 31x2=62
2n^2-1
31 ÷ 5 = 6 with remainder 1