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Question

If January 10th, 1980 was a Saturday, then what day of the week it must have been on January 1st, 1979?

यदि 10 जनवरी, 1980 को शनिवार था, तब 1 जनवरी 1979 को सप्ताह का कौन-सा दिन था?

A
Tuesday

मंगलवार
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B
Wednesday

बुधवार
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C
Thursday

वृहस्पतिवार
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D
Friday

शुक्रवार
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Solution

The correct option is B Wednesday

बुधवार
The year 1979 is an ordinary year and so it has 1 odd day. So, the day on 10th January 1980 is one day beyond the day that was on 10th January 1979. As January 10th, 1980 was a Saturday, January 10th, 1979 must be a Friday.

Now, 7 days back, i.e. on 3rd of January, 1979 it must have been a Friday too. So, on 1st January, 1979 it must have been a Wednesday.

वर्ष 1979 एक साधारण वर्ष है और इसलिए इसमें 1 विषम दिन है। इसलिए, 10 जनवरी 1980 का दिन 10 जनवरी, 1979 के दिन से एक दिन बाद का दिन है। चूंकि 10 जनवरी, 1980 के दिन शनिवार था, अतः 10 जनवरी 1979 को शुक्रवार होना चाहिए।

अब, 7 दिन पीछे, अर्थात 3 जनवरी 1979 को भी शुक्रवार होना चाहिए। इसलिए, 1 जनवरी 1979 को बुधवार होना चाहिए।

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