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.