Decimal system.

From the numbers 3,4,5,6 make the largest three-digit numer

• 654

• 645

• 634

• 635

Make the largest four-digit nymber out of the numbers 2,4,6,8

• 8246

• 8462

• 8624

• 8642

Make the smallest four-digit number out of the numbers 0,1,2,3

• 1023

• 1032

• 2013

• 3021

From the numbers 1,2,3,4, make the largest three-digit numer

• 432

• 431

• 123

• 134