Replace the question mark with a numberMATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 159
The first user who solved this task is Vladimir Krnac.
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Britain thinks metricIn 1965, Hansard, the official record of all English parliamentary debates, recorded in an Appendix the statement by Mr Jay (President of the Board of Trade) saying he was impressed by the case for adoption of the metric system—by a long-term, gradual, voluntary process—and was arranging for the British Standards Institution to investigate. Eventually, as a member of the European Common Market, the transition to the metric system for trade and commerce became obligatory.