Question

How many numbers will be there between 300 and 500 where 4 comes only one time?

Answer 1

Hi there!
Here's the answer:

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In b/w 300 - 500, 4 comes only once in these cases:

304
314
324
334
340
341
342
343
344
345
346
347
348
349
354
364
374
384
394
400

•°• No. of possible cases = 20
•°• No. of No.s between 300-500 where 4 comes only once = 20

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:)

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Hope it helps