Question

The numbers 3.465 and 3.455 on rounding off to 3 significant figures will be

Answer 1

The rules to round off significant digits here are:

1. If the number if is 5 and the next number is even then we will not change the number. It will remain same

2. If the number is 5 and the next digit is odd then we will add one to the odd number. Hence, it will get increment by 1.

a) Now, The number is 3.465, and the digit next to 5 is 6, which is even. Hence, we wont change it.

= 3.46

b) Now, the number is 3455, and the digit next to 5 is 5, which is odd. Hence, we will add 1 to it

= 3.46