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Browse complete papersWhat are the Highest Common Factor and Lowest Common Multiple of 6, 72, 120?
12, 180
6, 360
360, 6
12, 360
Correct answer
12, 180
If a quadratic polynomial y = ax2 + bx + c intersects x axis at α and β, then
α + β = -b/a
α + β = a/b
α × β = a/c
α/β = 1
Correct answer
α + β = -b/a
If in two linear equations ax + by = c and dx + ey = f and a/d = b/e = c/f then, which of the following is true about the two equations?
They represent intersecting lines
They represent coincident lines
Have a unique solution
None of these
Correct answer
They represent intersecting lines
Roots of the quadratic equations 2x2 + x – 528 = 0 is:
16
-33/2
Both 1 & 2
None of these
Correct answer
16
Sum of all positive integers from 1 to 100 is:
5050
5020
10800
2400
Correct answer
5050
If area of similar triangles ΔABC and ΔDEF be 64 sq cm and 121 sq cm and EF = 15.4 cm then BC equals:
8 cm
18 cm
11.2 cm
8.2 cm
Correct answer
8 cm
Area of a triangle with vertices at (2, 3), (-1, 0) and (2, -4) is:
21/2 cm
21/2 sq units
21 sq units
none of these
Correct answer
21/2 cm
2 × tan 30°/ (1 + tan2 30°) equals:
sin 60°
cos 60°
tan 60°
sin 30°
Correct answer
sin 60°
The angle of elevation of the top of a tower from a point on ground which is 30 mtrs. away from the foot of the tower is 30°. Height of the tower is:
10/√3 mtrs
10 × √3 mtrs
100 mtrs
20 mtrs
Correct answer
10/√3 mtrs
The length of a tangent from a point A at a distance 5 cms from the centre of the circle is 4 cms. Radius of the circle is
2 cms
3 cms
√3 cms
3√/2 cms
Correct answer
2 cms