 | Richard Carr (Arithmetician) - Algebra - 1751 - 258 pages
...I2=s6 14+12 by the 3d.|i61.y— 8 No. («в) No. 107. A certain Number conflits of two Places, which is equal to four times the Sum of its Digits, and if to the Number you add eighteen, the Digits will bç inverted. What is the Number ? Then And 3—4*... | |
 | John Bonnycastle - Algebra - 1813 - 456 pages
...Son 40O/., daughter l6o/, 1 7- There is a certain number, 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 18. A person being asked how many... | |
 | John Bonnycastle - Algebra - 1818 - 326 pages
...Son 400Z., daughter 160/. 16. There is a certain number, 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.... | |
 | John Bonnycastle - Algebra - 1825 - 336 pages
...Son 400Z., daughter 160Z. 16. There is a certain number, 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... | |
 | John Bonnycastle - Algebra - 1829 - 372 pages
...Son 400/., daughter 1GOI. 16. There is a certain number, 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... | |
 | John Bonnycastle - Algebra - 1837 - 296 pages
...Son 400/., daughter 160/. 16. There is a certain number, consisting of two places of figures, which is equal to four times the sum of its digits ; and if 1 8 be added to it, the digits will be inverted ; what is the number ? Ans. 24. 17. Two persons, A... | |
 | Richard W. Green - Algebra - 1839 - 156 pages
...Ans. 8 and 12. 4. There is a certain number, consisting of two places of figures, which is equal to 4 times the sum of its digits ; and if 18 be added to it, the digits will be inverted. What is that number 1 Let x= first digit or tens ; and y= the units.... | |
 | John D. Williams - Algebra - 1840 - 634 pages
...share, and the son's share. 28. There is a certain number, consisting of two places of figures, which is equal to four times the sum of its digits ; and if eighteen be added to it, the digits will be inverted. What ù the number ? Here it may be observed,... | |
 | James Wood - Algebra - 1841 - 492 pages
...3 digits in order, be divisible by 8. 12. There is a certain number consisting of two digits, which is equal to four times the sum of its digits ; and if to the number 18 be added, the digits will be reversed. 13. The two digits of which a number consists... | |
 | Samuel Alsop - Algebra - 1846 - 300 pages
...their squares as б to 78. What are they ? - - - Ans. 12 and 18. Ex. 41. A certain number is equal to 4 times the sum of its digits, and if 18 be added to it, its digits will be inverted. What is the number ? Ans. 24. Ex. 42. A traveller states that he has,... | |
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There is a certain number, 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. 
