I like math x me = learn to learn to learn to learn.
Thinking of solving problems: factorization is not needed. (Note that this is an Olympiad problem in primary schools, and factorization is unnecessary. )
Look at the mantissa first: learn X. My mantissa is learning. ("I" is not 0, 1)
Use enumeration method: try to multiply the mantissa of "I" = 2 by 9 to see the mantissa. (Refer to multiplication table)
I =2 impossible;
I =3, learning = 5;
I =4 impossible;
I =5 impossible (I am different from studying);
I =6, learning = 2, 4, 8;
I =7, learning =5.
I =8. No way.
I =9 impossible
There are only five possibilities in total. According to the first digit of the original formula, we can get that I want to carry X (I+1), and the maximum digit of X cannot be less than "Xue"; I'm x (I-1), and I want to carry it. The maximum number of digits can't be greater than learning.
I =3, Xue =5, 3X4= 12, 12, 3> impossible.
I =6, study =4, 4=4, 3.
fbyi 947 20 14- 1 1- 19
I like math x me = learn to learn to learn to learn.
Thinking of solving problems: factorization is not needed. (Note that this is an Olympiad problem in primary schools, and factorization is unnecessary. )
Look at the mantissa first: learn X. My mantissa is learning. ("I" is not 0, 1)
Use enumeration method: try to multiply the mantissa of "I" = 2 by 9 to see the mantissa. (Refer to multiplication table)
I =2 impossible;
I =3, learning = 5;
I =4 impossible;
I =5 impossible (I am different from studying);
I =6, learning = 2, 4, 8;
I =7, learning =5.
I =8. No way.
I =9 impossible
There are only five possibilities in total. According to the first digit of the original formula, we can get that I want to carry X (I+1), and the maximum digit of X cannot be less than "Xue"; I'm x (I-1), and I want to carry it. The maximum number of digits can't be greater than learning.
I =3, Xue =5, 3X4= 12, 12, 3> impossible.
I =6, study =4, 4=4, 3.
fbyi 947 20 14- 1 1- 19