Term 2 Algebra Two Marks Question

7th Standard

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Maths

Time : 00:45:00 Hrs
Total Marks : 30
15 x 2 = 30
1. Express each of the following numbers using exponential form.
512

2. Express each of the following numbers using exponential form.
343

3. Simplify the following.
52 ×104

4. Find the value of the following.
(−4)2

5. Simplify using laws of exponents.
3y ×12y

6. Simplify using laws of exponents.
256 × 56

7. Find the unit digit of expanded form.
1110

8. Find the unit digit of expanded form.
4615

9. Find the degree of the following terms.
−125

10. Find the degree of the following terms.
3z

11. 62×6m = 65, find the value of ‘m’.

12. Find the unit digit of 124128x126124.

13. Find the value of w, given that x = 3 , y = 4 , z = −2 and w = x2 − y2 + z2 − xyz .

14. Simplify and find the degree of 6x2 + 1 - [8x - {3x2 - 7 - (4x2 - 2x + 5x + 9)}]

15. The two adjacent sides of a rectangle are 2x2 − 5xy + 3z2 and 4xy − x2 − z2 . Find the perimeter and the degree of the expression.