Archives

The proteins encoded by Cry1ac and Cry2ab genes act on which of the following-

a) Nematodes b) Pinworms c) Boll worms d) Book worms Answer: c) Boll worms. Explanation: The Cry proteins (Cry1ac and Cry2ab) are found... View Article

The organism which is autotrophic but does not have the pigment is?

a) Nostoc b) Wolffia c) Yeast d) Nitrosomonas Answer : d) Nitrosomonas Explanation: Both Nitrosomonas and Nitrobacter do not undergo... View Article

The Roman number for 283 is

In Roman Numerals, 100 is denoted by C, 50 is denoted by L and 10 is denoted by X Therefore Roman Numeral for 283 is CCLXXXIII... View Article

Simplest form of 4372/5402 is

GCD(4372, 5402) = 2 So, dividing both numerator and denominator of by 2 GCD(2196, 2701) = 1 Therefore the simplest form of... View Article

Every real number is an irrational number

False, because there are many examples of real numbers which are not irrational, for example, 2, ½, 1.24 all are real numbers but not... View Article

What should be multiplied to 555 to get 560, 60, 550?

To get 560 we must multiply 560/555 to 555 555 × 560/555 = 560 Similarly, to get 60 we multiply 60/555 to 555 And to get 550 we multiply... View Article

What multiplied equals 7?

Since 7 is a prime number, so the two numbers which could be multiplied to get 7 is 7 × 1... View Article

Let the p.m.f (probability mass function) of a random variable x be P(x)= (4/x)(5/9)^x(4/x)^4-x when x = 0, 1, 2, 3, 4 otherwise P(x) = 0. Find E(x) and Var(x)

Given, P(x) = for x = 0, 1, 2, 3, 4 otherwise P(x) = 0 x 0 1 2 3 4 P(x) ∞ 1280/9... View Article

Let m be the mid-point and l be the lower class limit of a class in a continuous frequency distribution’ the upper-class limit of the class is:

Mid point of a class=(lower limit + upper limit)/2 Then, upper limit = 2 × mid-point − lower limit Therefore, upper limit = 2m − l... View Article

The slope of the tangent to locus of y = cos^-1(cos x) at x = (pi)/4

Given curve y = cos-1(cos x) At x = π/4 y = cos-1(cos π/4) y =... View Article

Given that the divisors of n = 3^p 5^q 7^r are in the form of 4λ + 1, then

If 4λ + 1 is the divisor of n= 3p.5q.7r, then n must be a multiple of... View Article

Find a range of values of c such that the lines x-y = 2 and cx+y=3 intersect in the first quadrant

In the first quadrant x>0 and y>0, so we shall find values of c for x>0 and y>0 Now, x-y = 2 ⇒ x = y + 2 cx + y = 3 ⇒... View Article

In a GP if the (2p)^th term is q^2 and (2q)^th term is p^2 where p and q ∈ N, find the (p +q)^th term

Let a be the first term of G.P. and r be the common difference. Then, T2p = ar(2p-1)... View Article

If HCF (18,72) = 18, then LCM (18,72) is:

We know HCF(a, b) × LCM(a, b) = a × b Given HCF(18, 72) = 18 and 18 × 72 = 1,296 Therefore, LCM(18, 72) = 1,296... View Article

How does division work?

The which we need to divide is called the dividend and the number with which we divide the number is called the divisor. To divide the dividend... View Article

How to find HCF of 430,516, and 817 by using the long division method

To find the HCF of 430, 516 and 817 by using the long division method- Step 1: Divide 516 by 430 Step 2: Divide 430 by the remainder 86 Step... View Article

Let Z1 and Z2 be two complex numbers such that (Z1−Z2)/(2−Z1 BarZ2) is unimodular and Z2 is not unimodular, find the modulus of Z1

A complex number Z is unimodular, if Given, Now, Given, ⇒ Using property of modulus, ⇒... View Article

Create a puzzle for kids with a number as an answer

Complete the magic square: Solution: A magic square is a square in which numbers are placed in such a way that if we add the numbers row-wise... View Article

Only the current inside the Amperian loop contributes in

a) Finding magnetic field at any point on the Ampere's loop b) Line integral of magnetic field c) In both of the above d) In neither of them... View Article

A particle of mass 0.1kg executes SHM under a force F=(−10x)N. Speed of particle at mean position is 6m/s. Then amplitude of oscillations is

Solution:... View Article