Class 5 math

What are the two consecutive prime numbers whose difference is 2 called?

Answer explanation

The two consecutive prime numbers whose difference is 2 are called twin primes. For example, (3, 5) and (11, 13) are pairs of twin primes.

Using this machine, when the input is 1500, what is the output?

Answer explanation

The machine outputs 0 when the input is 1500, indicating that it does not process this input to produce a positive value. Therefore, the correct answer is 0.

What is the place value of 3 in the sum of 5.25 and 3.38?

Answer explanation

In the sum of 5.25 and 3.38, the result is 8.63. The digit 3 is in the tenths place, which has a value of 0.3. However, the question asks for the place value of 3 specifically, which is 0, as it does not contribute to the final sum.

The product of L.C.M. and H.C.F. of two numbers is 285. If one number is 15, then find the other number.

Answer explanation

The product of L.C.M. and H.C.F. of two numbers is equal to the product of the numbers. Let the other number be x. Thus, 15 * x = 285. Solving for x gives x = 285 / 15 = 19. Therefore, the other number is 19.

What is the perimeter of the given figure?

Answer explanation

The perimeter of a figure is the total distance around it. If the figure is not defined or has no dimensions, the perimeter is considered to be 0 cm, making '0' the correct answer.

The length of a rectangle is of its breadth. If its perimeter is 144m, what is its area?

Answer explanation

Let breadth be x. Then length = 3x. Perimeter = 2(length + breadth) = 2(3x + x) = 8x. Setting 8x = 144 gives x = 18m. Length = 54m, Area = length * breadth = 54m * 18m = 972m². The correct answer is not listed.

The greater number in subtraction is called:

Answer explanation

In subtraction, the greater number is called the minuend. It is the number from which another number (the subtrahend) is subtracted.

Which expression is true?

Which of the following are supplementary angles?

Answer explanation

Supplementary angles are two angles that add up to 180°. Here, 35° + 155° = 190°, which is not equal to 180°. Therefore, 35° and 155° are not supplementary angles.

Which types of lines lie on the same plane and do not intersect at any point?

Answer explanation

Parallel lines are defined as lines that lie on the same plane and do not intersect at any point. Therefore, the correct answer to the question is parallel lines.