The reciprocal of -3/4 is__________
Answer: The reciprocal of -3/4 is -4/3. Reciprocal In Mathematics, reciprocal means an expression which when multiplied by another expression,... View Article
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What is odd function?
Answer: When x is replaced with -x, the odd functions return their negative inverse. This implies that f(x) is an... View Article
If line y−x + 2 = 0 is shifted parallel to itself towards the x-axis by a perpendicular distance of 3√2 units, then the equation of the new line may be (1) y = x + 4 (2) y = x + 1 (3) y = x – (2 + 3√2) (4) y = x – 8
If line y – x + 2 = 0 is shifted parallel to itself towards the x-axis by a perpendicular... View Article
(secA + tanA)(1− sinA)=? (1) cosA (2) sinA (3) secA (4) cotA
(secA + tanA)(1− sinA)=? (1) cosA (2) sinA (3) secA (4) cotA Answer: (1) cosA We know that, sec A=... View Article
When petrol drops from a vehicle fall over rain water on road surface, colours are seen because of (1) Dispersion of light. (2) Interference of light. (3) Scattering of light. (4) Absorption of light.
Answer: (2) Interference of light. Petrol is a type of gasoline that is used to fuel various vehicles and generators.... View Article
If sinθ – cosθ = 0, then the value of (sin4θ+cos4θ) is (1) 1 (2) 3/4 (3) 1/2 (4) 1/4
Answer: (3) 1/2 Given sinθ – cosθ = 0 sinθ = cosθ The above condition is possible only when θ... View Article
The number of three digit odd numbers that can be formed with 1,2,3,4,5 is (1) 36 (2) 60 (3) 24 (4) 53
Answer: (1) 36 Odd numbers are the numbers that cannot be divided by 2 evenly. It cannot be divided into... View Article
If LCM(x, 18) = 36 and HCF(x, 18) = 2, then x is (a) 2 (b) 3 (c) 4 (d) 5
If LCM(x, 18) = 36 and HCF(x, 18) = 2, then x is (a) 2 (b) 3 (c) 4 (d)... View Article
The root pressure is positive or negative?
Answer: Root pressure is a force or the hydrostatic pressure generated in the roots that help in driving the fluids... View Article
Let a1, a2, a3,…….,a49 be in A.P. such that [latex]sum_{k=0}^{12} a_{4k+1} = 416 ; ; and ; ; a_9 + a_{43} = 66[/latex]. If a12 + a22 + ……..+ a172 = 140 m, then m is equal to (a) 68 (b) 34 (c) 33 (d) 66
Answer: (b) 34 An arithmetic sequence or progression is defined as a sequence of numbers in which for every pair... View Article
With what velocity should an alpha- particle travel toward the nucleus of a copper atom at a distance of 10-13m from the nucleus of the copper atom ?
With what velocity should an alpha- particle travel toward the nucleus of a copper atom at a distance of 10<sup>-13</sup>m... View Article
How to convert fractions to decimals?
Answer: In Mathematics, a fraction represents a numerical value, which defines the parts of a whole. The basics of fractions... View Article
Time of ascent is equal to (1) Time of journey (2) Time of descent (3) Both (a) and (b) above (4) None of these
Time of ascent is equal to (1) Time of journey (2) Time of descent (3) Both (a) and (b) above... View Article
If 9 times the 9th term of an AP is equal to 13 times the 13th term, then the 22nd term of the AP is (1) 0 (2) 22 (3) 220 (4) 198
Answer:(1) 0 An arithmetic sequence or progression is defined as a sequence of numbers in which for every pair of... View Article
What is the oxidation number of Mn in K2MnO4,MnSO4,MnO2 and Mn3O4 respectively? (1) +7,+6,+2,+4, +8/3(2) +4,+6,+2,+4, +8/3 (3) +7,+6,+2,+3, +8/3 (4) None of these
Answer: (1) +7,+6,+2,+4, +8/3 Let x be the oxidation number of Mn in MnO2.Since the overall charge on the complex... View Article
If x = t2,y = t3 then dx2/d2y= (1) 3/2 (2) 3/4t (3) 3/2t (4) 3t/2
If x = t2,y = t3 then dx2/d2y= (1) 3/2 (2) 3/4t (3) 3/2t (4) 3t/2 Answer: (2) 3/4t Given... View Article
A direct current of 5 amp is superimposed on an alternating current I=10 sin omega t flowing through a wire. The effective value of the resulting current will be________
Answer: A direct current of 5 amp is superimposed on an alternating current I=10 sinωt flowing through a wire. The... View Article
How to get a Percentage?
Answer: In mathematics, a percentage is a number or ratio that can be expressed as a fraction of 100. If... View Article
An electron moves in a circular orbit with a uniform speed v. It produces a magnetic field B at the centre of the circle. The radius of the circle is proportional to_______
Answer: An electron moves in a circular orbit with a uniform speed v. It produces a magnetic field B at... View Article
How to Convert 256 in Binary?
Answer: (256)10 = (100000000)2 According to digital electronics and mathematics, a binary number is defined as a number that is... View Article
