# CBSE Board 2020

## Mathematics

### Question Paper Solution

#### Section A

##### 1 Mark Questions

Question 1: The point P on x-axis are equidistant from the points A(-1,0) and B(5,0) is

- (2, 0)
- (0, 2)
- (3, 0)
- (2, 2)

**Answer:** (a) (2, 0)

Question 2: The coordinates of the point which is reflection of point (-3, 5) in x-axis are

- (3, 5)
- (3, -5)
- (-3, -5)
- (-3, 5)

**Answer:** (c) (-3, -5)

Question 3: If the point P (6, 2) divides the line segment joining A (6, 5) and B (4, y) in the ratio 3 : 1, then the value of y is

- 4
- 3
- 2
- 1

**Answer:** (d) 1

Question 4: The sum of exponents of prime factors in the prim-factorisation of 196 is

- 3
- 4
- 5
- 2

**Answer:** (b) 4

Question 5: Euclid’s division Lemma states that for two positive integers a and b, there exists unique integer q and r satisfying `a=bq+r` and

- 0 < r < b
- 0 < r ≤ b
- 0 ≤ r < b
- 0 ≤ r ≤ b

**Answer:** (c) 0 ≤ r < b

Question 6: The zeroes of the polynomial `x^2-3x-m(m+3)` are

- m, m + 3
- –m, m + 3
- m, -(m + 3)
- –m, -(m + 3)

**Answer:** (b) –m, m + 3

Question 7: The value of k for which the system of linear equations `x+2y=3`, `5x+ky+7=0` is inconsistent is

- `-(14)/3`
- `2/5`
- 5
- 10

**Answer:** (d) 10

Question 8: The roots of the quadratic equation `x^2-0.04=0` are

- ± 0.2
- ± 0.02
- 0.4
- 2

**Answer:** (a) ± 0.2

Question 9: The common difference of the AP `1/p`, `(1-p)/p`, `(1-2p)/p`, ….. is

- 1
- `1/p`
- -1
- `-1/p`

**Answer:** (c) – 1

Question 10: The n^{th} term of the AP a, 3a, 5a, ……… is

- na
- (2n -1)a
- (2n + 1)a
- 2na

**Answer:** (b) (2n -1)a