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I have no idea what this problem means: For how many twodigit numbers if the ones digit larger than the tensdigit? Can you find a systematic way to arrive at the number? Ok, every 2digit number looks like xy, where x is the 
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Find the sum of all 3digit positive numbers N that satisfy the condition that the digit sum of N is 3 times the digit sum of N+3. Details and assumptions The digit sum of a number is the sum of all its digits. For example, 1123 
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Can you write them in Mathematical/numbers form I'll solve them myself. i don't really get it though i have written the first one in mathematical for but i'm not sure if that's right. 1. When six is subtracted from five times a 
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i am a 5 digit palindromic number. My third digit is 5 more than my fifth digit , my fourth digit is 2 times greater than my first digit. The sum of my digit is 14 What number am i? 
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You have 2 digits, 2 numbers, reverse digits and 54 if the difference and the sum of all is 10 I'm not clear what you're asking, could you clarify what the conditions are for us please? My grandson came home with the problem that 
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The sum of the digit of A three digit number is 20 .the middle digit is equal to one fourth the sum of the other two. If the order of the digi be reversed the number increases the original number by woo .find the original number 
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find 2 prime numbers that if multiplied would generate a 400 digit number I'm not sure what you want. 400 is a threedigit number, and 4000 is a fourdigit number. I don't think you want a "400 digit number." Assuming you want a 
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one of two digit of a two digit number is 5 time other digit if we interchange the digit of is two digit number the resulting new number is 6 more then thrice theoriginal number find two digit original two digit number 
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a certain twodigit number is 6 less than the sum of its tens digit and 7 times its units digit. if the digits are reversed the number is increase by 27. fin the original twodigit numbers 
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A positive integer is called a rising number If its digits form a strictly increasing sequence. for example, 1457 is a rising number, 3438 is not a rising number, and neither 2334. Questions: How many 3digit rising numbers are