Algebraic Simplification Test 2

A bag contains an equal number of one rupee, 50 paisa and 25 paisa coins. If the value of money in the bag is Rs.35, find the total number of coins of each type?

What is the difference between the local value of 7 and 5 in the number 2,574?

Solve:
0.21 x 21 – 0.00021 + 0.021?

 The value of 8.4 x 8.4 + 2 x 8.4 x 6.9 + 6.9 x 6.9?