Explanation

George Cantor, a German mathematician, is known as the father of set theory.

He introduced the concept of infinite sets and their cardinalities in the late 19th century.

Explanation

Factors of 4 = 1, 2, 4

Factors of 6 = 1, 2, 3, 6

Factors of 8 = 1, 2, 4, 8

Highest Common Factor (H.C.F) = 2 (common to all three numbers)

Explanation

In Pakistan and India, land area is measured in units such as marlas, kanal, and acres:

• 1 acre = 160 marlas
• 1 kanal = 20 marlas
• 1 acre = 8 kanals

Explanation

In the number 3794, the digit 9 is in the hundreds place.

To understand place value, each digit in a number occupies a specific position that represents its value relative to the place it occupies. In the number 3794, the digit 9 is in the hundreds place, which means it represents 9 hundreds or 900.

So, the place value of 9 in the number 3794 is indeed hundreds.

Explanation

Explanation

Explanation

A number is exactly divisible by 5 if it ends in 0 or 5.

230590 ends in 0, so it is divisible by 5.

Explanation

The symbol ∩ represents the common elements between two or more sets.

For example, if A = {1, 2, 3} and B = {2, 3, 4}, then A ∩ B = {2, 3}.

Explanation

The product of two integers of the same sign is always Positive.

Same sign (both positive or both negative) multiplication gives positive result.

Opposite signs give negative product.

Explanation

42 ÷ 7 = Rs. 6 per folder

50 ÷ 6 ≈ Rs. 8.33 per folder

56 ÷ 8 = Rs. 7 per folder

72 ÷ 9 = Rs. 8 per folder