Hindi, asked by kunaljakar7084095695, 7 months ago

1. If A = 2n + 13, B = n + 7, where n is a natural number then HCF of A and B is:
(a) 2
(b) 1
(c) 3
(d) 4

2. L.C.M. of 23 × 32 and 22 × 33 is :
(a) 23
(b) 33
(c) 23 × 33
(d) 22 × 32

3. The HCF and LCM of two numbers are 33 and 264 respectively. When the first number is completely divided by 2 the quotient is 33. The other number is:
(a) 66
(b) 130
(c) 132
(d) 196

4. If two positive integers p and q can be expressed as p = ab2 and q = a3b; a, b being prime numbers, then LCM (p, q) is
(a) ab
(b) a2b2
(c) a3b2
(d) a3b3

5. The least number that is divisible by all the numbers from 1 to 10 (both inclusive) is
(a) 10
(b) 100
(c) 504
(d) 2520

6. The quadratic polynomial whose sum of zeroes is 3 and product of zeroes is –2 is :
(a) x2 + 3x – 2
(b) x2 – 2x + 3
(c) x2 – 3x + 2
(d) x2 – 3x – 2

7. If (x + 1) is a factor of 2x3 + ax2 + 2bx + 1, then find the values of a and b given that 2a – 3b = 4
(a) a = –1, b = –2
(b) a = 2, b = 5
(c) a = 5, b = 2
(d) a = 2, b = 0

8. The number of zeroes that polynomial f(x) = (x – 2)2 + 4 can have is:
(a) 1
(b) 2
(c) 0
(d) 3

9. The zeroes of the polynomial f(x) = 4x2 – 12x + 9 are:
(a)
(b)
(c) 3, 4
(d) –3, –4

10. If p(x) is a polynomial of at least degree one and p(k) = 0, then k is known as
(a) value of p(x)
(b) zero of p(x)
(c) constant term of p(x)
(d) none of these

PART 2

1. Customers are asked to stand in the lines. If one customer is extra in a line, then there would be two less lines. If one customer is less in line, there would be three more lines. Find the number of students in the class.
(a) 40
(b) 50
(c) 60
(d) 70
2. 8 girls and 12 boys can finish work in 10 days while 6 girls and 8 boys can finish it in 14 days. Find the time taken by the one girl alone that by one boy alone to finish the work.
(a) 120, 130
(b) 140,280
(c) 240,280
(d) 100,120
3. The sum of two digits and the number formed by interchanging its digit is 110. If ten is subtracted from the first number, the new number is 4 more than 5 times of the sum of the digits in the first number. Find the first number.
(a) 46
(b) 48
(c) 64
(d) 84
4. A fraction becomes . when subtracted from the numerator and it becomes . when 8 is added to its denominator. Find the fraction.
(a) 4/12
(b) 3/13
(c) 5/12
(d) 11/7
5. Five years ago, A was thrice as old as B and ten years later, A shall be twice as old as B. What is the present age of A.
(a) 20
(b) 50
(c) 60
(d) 40
6. What will be the solution of these equations ax+by=a-b, bx-ay=a+b
(a) x=1, y=2
(b) x=2,y=-1
(c) x=-2, y=-2
(d) x=1, y=-1
7. If x=a, y=b is the solution of the pair of equation x-y=2 and x+y=4 then what will be value of a and b
(a) 2,1
(b) 3,1
(c) 4,6
(d) 1,2
8. Rozly can row downstream 20km in 2 hours, and the upstream 4km in 2 hours. What will be the speed of rowing in still water?
(a) 6km/hr
(b) 4km/hr
(c) 3km/hr
(d) 7km/hr​

Answers

Answered by adity29240
4

Answer:

Please mark me as brainlist

  1. HCF of A and B is 1
  2. orrect option A
  3. 132. 
  4. a3b2
  5. 2520
  6. Correct answer is option 'D'.
  7. a=5,b=2   
  8. f(x) = (x – 2)² + 4 can have is 2
  9. x = 3/2 ;
  10. zero of p(x).

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