Page 41 - aljaber

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[AJHSME 1991] ( )

991 + 993 + 995 + 997 + 999 = 5000 − N

N

25 ( ) 15 ( ) 10 ( ) 5 ()

[AJHSME 1991] ( )

{−24,−3,−2,2, 8}

12 ( ) 8( ) −3 ( ) −24 ( )

46 1 [AJHSME 1991] ( )

53

25 ( ) 24 ( ) 21 ( ) 18 ( )

[AJHSME 1991] ( )

25 × 25 ×25 ×25 × 25 ×25 × 25 × 8 × 8 × 8

10 ( ) 9( ) 6( ) 3 ()

[AJHSME 1991] ( )

.

ABC
AB

+A
300

C