Try it on paper first. A hint, the key idea and the worked solution are here when you need them.
A carbon resistor has the bands green, blue, red, gold. Find its resistance and the range in which its true value lies. Which bands would a resistor with a tolerance of have?
For a metal, , with . In a colour code, the first two bands give digits, the third gives the power of ten, and the last gives the tolerance: gold , silver , none .
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. The value. The digits are and , so . The multiplier is . So .
Step 2. The range. Gold is , which is . The value lies between and .
Step 3. The resistor. . The digits are and , so the first two bands are orange and orange. The multiplier is brown. Gold gives the tolerance. So: orange, orange, brown, gold.
Answer: , between and ; orange, orange, brown, gold.
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