Explanation

Ratios 8:15 and 8 to 15 represent the same value (8 ÷ 15).

15:8 is the reverse (15 ÷ 8), so it is different from the others.

Last verified on 16-03-2026

Explanation

The degree of 4³ is 3, which makes it a cubic expression.

Quadratic = degree 2, Biquadratic = degree 4.

Last verified on 16-03-2026

Explanation

Total surface area of cylinder = 2πr(h + r)

Given r = 1, h = 1

= 2π(1)(1+1)

= 4π cm²

Last verified on 16-03-2026

Explanation

Two line segments are congruent if they have the same length.

So, mOP = mQR means the segments OP and QR are congruent.

Last verified on 15-03-2026

Explanation

Using difference of squares:

a² - 9 = a² - 3² = (a+3)(a-3)

Last verified on 16-03-2026

Explanation

In a base-5 number system, the numerals used are 0, 1, 2, 3, 4.

Last verified on 16-03-2026

Explanation

Let equal sides = x, third side = x + 5

Perimeter: x + x + (x+5) = 50

3x + 5 = 50

3x = 45

x = 15

Third side = x+5 = 15+5 = 20

Last verified on 16-03-2026

Explanation

To convert marks to percentage:

Formula: (Marks obtained / Total marks) × 100

= (72 / 80) × 100

= 0.9 × 100

= 90%

Last verified on 16-03-2026

Explanation

To find the largest number, first subtract the remainder:

92 - 2 = 90

74 - 2 = 72

Now, find the HCF of 90 and 72:

HCF(90, 72) = 18

Last verified on 16-03-2026

Explanation

Roman numerals do not have a symbol for zero.

All other numbers like Four (IV) and Thousand (M) have specific Roman numeral symbols.

Last verified on 16-03-2026