Mathematics
NULL
Medium
Question
What percentage of the integers from 1 to 70 have squares ending in the digit 1?
A
1
B
14
C
20
✓ Official correct answer
D
21
Community credibility
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A
1
No member explanations yet for this option.
B
14
No member explanations yet for this option.
C
20
No member explanations yet for this option.
D
21
No member explanations yet for this option.
Explanation
Numbers ending in 1 or 9: 14 of them. 14/70 = 20%.