a. 31159

b. 31149

c. 31139

d. 31129

Answer:b. 31149

Explanation:

a. 654

b. 123

c. 129

d. 998

Answer:c. 129

a. 4163

b. 7234

c. 6754

d. 9076

Answer:a. 4163

a. 545434576

b. 658734527

c. 120954890

d. 996658921

Answer:a. 545434576

a. 2376555

b. 7743219

c. 4114413

d. 3209176

Answer:c. 4114413

a. 98345621

b. 35579139

c. 22243456

d. 10934865

Answer:b. 35579139

a. 2234

b. 4771

c. 6543

d. 3211

Answer:b. 4771

a. 7781534

b. 5585676

c. 1267900

d. 9117479

Answer:d. 9117479

a. 42778

b. 44339

c. 55432

d. 70654

Answer:a. 42778

a. 23

b. 54

c. 22

d. 45

Answer:d. 45

Exercise 1

Exercise 2

Exercise 3

Exercise 4

Exercise 5

Exercise 6

Exercise 7

Exercise 8

Exercise 9