Question
The digit in unit’s place of the number $(1570)^2 + (1571)^2 + (1572)^2 + (1573)^2$ is :
Answer: Option B
Answer: (b)Unit's digit in $(1570)^2$ = 0Unit's digit in $(1571)^2$ = 1Unit's digit in $(1572)^2$ = 4Unit's digit in $(1573)^2$ = 9∴ Required unit’s digit = Unit’s digit (0 +1+4 + 9) = 4
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Answer: (b)Unit's digit in $(1570)^2$ = 0Unit's digit in $(1571)^2$ = 1Unit's digit in $(1572)^2$ = 4Unit's digit in $(1573)^2$ = 9∴ Required unit’s digit = Unit’s digit (0 +1+4 + 9) = 4
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