Write the number in words in both the Indian and the International systems of numeration.

$689075$

Write the numbers in words in both the Indian and the International systems of numeration.

$879656430$

Write $7,00,12,306$ in words in Indian system of numeration. Rearrange the digits and find the smallest and the largest numbers formed by using each digit only once.

Arrange the numbers in descending order: $9082106, 10002300, 9123105 \text{and} 999256.$

Using each of the digits without repetition, form all possible numbers greater than seven thousand.

$4,5,6,8$

Using each of the digits without repetition, form all possible numbers greater than seven thousand.

Estimate.

Round off $33$ to the nearest ten.