Which of the following numbers is smallest?

a
1.067

b
1.67

c
10.67

d
16.7

The smallest number among the given options is 1.067, so the answer is a.

To determine the smallest number out of the given options, we can compare the numerical values.

The numbers are:
a) 1.067
b) 1.67
c) 10.67
d) 16.7

Comparing the decimal parts of each number, we find that 067 is smaller than 67.

Comparing the integer parts of each number, we find that:
1 < 10 < 16.

Thus, the smallest number is option a) 1.067.