The number of digits in the smallest num...

The number of digits in the smallest number, which when multiplied by 7 yields all nines, is 3 (b) 4 (c) 5 (d) 6s

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RS AGGARWAL-NUMBER SYSTEM-All Questions

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First 100 multiples of 10 i.e. 10, 20, 30, …. 1000 are multiplied t...
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The numbers 2,4,6,8,….. 98, 100 are multiplied together. The number ...
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Let S be set of prime numbers greater than or equal to 2 and less t...
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The digit in the units place of the number 123^(99) is 1 (b) 4 (c) ...
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Match list I with list II and select the correct answer: List I ...
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The digit in the units place of the number (67)^(25)-1 must be 0 (...
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The units digit in the product 274 xx 318 xx 577 xx 313 is 2 (b) 3 ...
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In the product 459 xx 46 xx 28* xx 484, the digit in the unit place is...
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