1023004 1023004
1023400 1023400
12340001234000
1020304 1020304
the second question
13X 1 1 = 13X( 10+ 1)= 130+ 13 = 143
12x 33 =( 10+2)x33 = 330+66 = 396
14x 55 = 14x5x 1 1 = 70x 1 1 = 770
15x 66 = 15x6x 1 1 = 90x 1 1 = 990
12 1x 1 1 = 12 10+ 12 1 = 1330
134 x 1 1 = 1340+ 134 = 1474
158 x 1 1 = 1580+ 158 = 1738
167 x 1 1 = 1670+ 167 = 1837
Third question
543x20 542x30 540x23 540x32
534x20 532x40 530x24 530x42
523x40 524x30 520x43 520x34
504 x23 504 x32 503 x24 503 x42 502 x34 502 x43
Then a truth at the beginning of 4 3 2 *** 72 kinds of 520x43 are the largest.
The fourth question is 203x16 = 3248 203x26 = 5278 203x36 = 7308 203x46 = 9338.
Question 5: Password 840242
The sixth question is 47x49=2303 1995 divided by 2 1=95.