Write the following numbers in the International System by using commas. 7345671

Simplify : 24 + 2 \(\times\) 8 ÷ 2 + 1

Simplify the following numerical expressions:100 + 8 ÷ 2 + {(3 \(\times\) 2) − 6 ÷ 2}

Use the properties of whole numbers and simplify. 4 \(\times\) 132 \(\times\) 25

Try to open my locked suitcase which has the biggest 5 digit odd number as the password comprising the digits 7, 5, 4, 3 and 8. Find the password.