Hello Everyone,
What is the most efficient way of solving this problem.
Thanks in advance.
1/40 + 1/41+ 1/42 + 1/43 + 1/44 + 1/45
fractions
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Depending on the answer choices there are different tricks around it.g-manatl wrote:Hello Everyone,
What is the most efficient way of solving this problem.
Thanks in advance.
1/40 + 1/41+ 1/42 + 1/43 + 1/44 + 1/45
The above sum is less than 1/8
B/c 1/40 + 1/40 + 1/40 +1/40 +1/40 +1/40 = 1/8
So among answer choices I will eliminate all choices greater than 1/8
You definitely NEVER want to do the usual LCM thing on such a question.