How many square numbers are there between 50 and 200?
Answer and explanation
Correct answer: C. 7
- Step 1: 8 x 8 = 64 is the first square above 50, and 14 x 14 = 196 is the last below 200.
- Step 2: The squares of 8, 9, 10, 11, 12, 13 and 14 give 7 numbers.
Answer
7.
Why not the others: 6 and 8 miscount the list of squares, and 14 is the largest root rather than the count.
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