Write down the twin-primes between $40 a n d 50$ .
_______________________________________

Open in App

Solution

A prime number is a number which is divisible by itself and $1$ .
A twin prime number is a prime number which is either $2$ less or $2$ more than another prime number.
Between $40 a n d 50$ there is only one set of twin prime number which is $41 a n d 43$

Suggest Corrections

Similar questions

The point A(-3, 2) is reflected in the x-axis to the point A'. Point A' is then reflected in the origin to point A".

(i) Write down the co-ordinates of A".

(ii) Write down a single transformation that maps A onto A".

The point A(4, 6) is first reflected in the origin to point A'. Point A' is then reflected in the y-axis to point A".

(i) Write down the co-ordinates of A".

(ii) Write down a single transformation that maps A onto A".

Attempt this question on graph paper.

(a) Plot A (3, 2) and B (5, 4) on graph paper.

(b) Reflect A and B in the x-axis to A' and B' respectively. Plot these points also on the same graph paper.

(i) the geometrical name of the figure ABB' A';

(ii) the measure of angle ABB';

(iii) the image A" of A, when A is reflected in the origin.

(iv) the single transformation that maps A' to A".

$V$ is a product of the first $41$ natural numbers $A = V + 1$ . The number of primes among $A + 1, A + 2, A + 3, A + 4, A + 39, A + 40$ .

Join BYJU'S Learning Program