Counting in tens, the numbers on either side of 516 are 510 and 520.Now,
510 is 516 - 510 = 6 units away, while
520 is 520 - 516 = 4 units away.
So, the nearer of the two is 520.
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520
Tio the nearest 10, it is 0.
As it ends with a five, it will round up, so 30 is the nearest 10.
10
The answer is 10