STOMPer Skywalker came across an error in a Physics ten-year-series book while studying for the O-level examinations.
"Hi to the people at Stomp!
"As you know now is the period for examinations, I was studying for my Physics exam when I came across this extremely elementary mistake in the answers by the publishers.
"This book is an O-level book containing past years' O-level questions and I expected the publisher to have spotted such an obvious mistake.
"I am sure even a Primary School kid would have spotted it."