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1
The product of two numbers is 640. Their difference is 12. Find these numbers.
12, 30
20, 32
30, 20
16, 40
2
One of the two digits of a two digit number is three times the other digit. If you interchange the digits of this 2-digit number and add the resulting number to the original number, you get 88. The original number is
25, 62
62, 26
26, 52
52, 25
3
Two numbers are in the ratio 5 : 3. If they differ by 18, then. The numbers are ________________
45, 27
25, 15
35, 21
65, 39
4
Find the value of discriminant for the equation
-1
97
None of these
5
Anup is four times as old as his son. If the sum of their ages is 50, find their ages.
5 and 40 years.
12 , 48 years
10 and 40 years
7 and 28 years.
6
What should be added to to make it a perfect square
7
9
11
if the roots of the quadratic equations are real and equal , then:
8
Factorise: 5 - 2x - 6xy + 15y
(1+2y)(4-3x)
(1+3y)(5-2x)
(1+2y)(4-2x)
(1-3y(2-2x)
If the three numbers are in the ratio 2:3:5, so that the sum of their squares is 608. Find the numbers respectively.
8,12, 20
12, 8, 20
20, 8, 12
20,12,8
10
Factorise:
(1+2x)(5x+3y)
(1+3x)(4x+5y)
(1+4x)(5x+2y)
Two numbers are such that the ratio between them is 3 : 5. If each is increased by 10, the ratio between the new numbers so formed is 5:7. Find the original numbers.
12, 20
20, 25
15.12
12
A nu7mber consists of two digits whose sum is 9. If 27 is subtracted from the original number. its digits are interchanged. Then the original number is___________________.
53
45
92
63
13
Express the following as the product of two factors:
(2x+3)(2x-3)
(2x-3)(2x-3)
(2x+3)(2x+3)
(2x-3)(2x+3)
14
15
16
The factors of are ______________
Factorization is not possible
17
Factorise: :
(a-b)[1-(a+b)]
(a+b)[1-(a-b)]
(a-b)[1-(a-b)]
none of these
18
The factors of are not equal to
19
At 't' minutes past 4 p.m, the time needed by the minute-hand of a clock to show 5 p.m. was found to be 3 minutes less than minutes. Find the value of t.
10 minutes
12 minutes
14 minutes
20
The base of a right angled triangle is 2cm less than the perpendicular. The length of, the hypotenuse is 10 cm. Which of the following equations represents this situation?