| John Bonnycastle - Algebra - 1813
...number is that, the quotient of which, when divided by the product of its two digits, shall be 2 ; • **and if 27 be added to it, the digits will be inverted** ? Ans. 36 17- The sum of three numbers in harmonical proportion is 191, and the product of the first... | |
| John Bonnycastle - Algebra - 1818 - 260 pages
...consisting of two places of figures, is equal to the difference of the squares of its digits, and if 36 **be added to it the digits will be inverted ; what is the number** ? Ans. 48 3. What two numbers are those, whose difference, sum, and product, are to each other as the... | |
| Jeremiah Day - Algebra - 1820 - 332 pages
...arithmetical progression ; and the number divided by the sum of its digits ie equal to 26 ; but if 198 **be added to it, the digits will be inverted. What is the number** ? Let the digits be equal to x— y, x, and x+y, respectively. Then the number = 100(a;— y) + 10o;... | |
| Miles Bland - Geometry - 1821 - 438 pages
...27. What number is that, which being divided by the product of its two digits, the quotient is two, **and if 27 be added to it, the digits will be inverted** ? Let x and у be the digits ; Л lox + у = the number, , юл? + и and — y- = 2 ; xy .'. 1007... | |
| James Ryan - Algebra - 1824 - 516 pages
...Prob. G. What number is that, which being divided by the product of its two digits, the quotient is 2; **and if 27 be added to it, the digits will be inverted** ? " Ans. 3G. Prob. 7. There are three numbers, the difference of whose difference is 5 ; their sum... | |
| Miles Bland - Algebra - 1824 - 383 pages
...'S?. What number is that, which being divided by the product of its two digits, the quotient is two, **and if 27 be added to it, the digits will be inverted** ? Let лг and у be the digits; .'. 10лг + y = the number, , lOx+y and - £ = 2; xy also by transposition,... | |
| John Bonnycastle - Algebra - 1825 - 312 pages
...consisting of two places of figures which is equal to four times the sum of its digits ; and if 18 **be added to it the digits will be inverted ; what is the number** ? Ans. 24. 17. Two persons, A and B, have both the same income ; A saves a fifth of his yearly, but... | |
| James Ryan - Algebra - 1826 - 383 pages
...Frob. 6. What number is that, which being divided by the product of its two digits, the quotient is 2 ; **and if 27 be added to it, the digits will be inverted** ? Ans. 36. Prob. 7. There are three numbers, the difference of whose differences is 5 ; their sum is... | |
| Jeremiah Day - Algebra - 1827 - 332 pages
...arithmetical progression ; and the number divided by the sum of its digits is equal to 26 ; but if 198 **be added to it, the digits will be inverted. What is the number** ? Let the digits be equal to x—y, x, and x+y, respectively. Then the number = 100(* — */) + 10x+(x+y)... | |
| John Bonnycastle - Algebra - 1829 - 312 pages
...consisting :>f two places of figures, which is equal to four times the .sum of its digits ; and if 18 fan **added to it the digits will be inverted ; what is the number 1** Ans. 24. 17. Two persons, A and B, have hotli the same income ; A saves a fifth of his yearly, but... | |
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