Explanation

• First angle = 40% of 90° = 0.4 × 90 = 36°
• Second angle = 60% of 90° = 0.6 × 90 = 54°

Last verified on 13-03-2026

Explanation

Nisar's percentage = 80/100 = 80%

Score out of 75 = 80% of 75 = 0.8 × 75 = 60

Last verified on 13-03-2026

Explanation

3 pipes fill the tank in 80 minutes.

1 pipe will fill it in 3 × 80 = 240 minutes.

5 pipes will fill it in 240/5 = 48 minutes.

Last verified on 13-03-2026

Explanation

Oranges sold = 2/7 × 140 = 40

Oranges spoilt = 3/14 × 140 = 30

Oranges left = 140 - 40 - 30 = 70

Last verified on 13-03-2026

Explanation

Fraction given to sister = 1/4

Fraction given to brothers = 2/3

Total fraction distributed = 1/4 + 2/3

= (3+8)/12

= 11/12

Last verified on 13-03-2026

Explanation

Unlike signs means: one integer is positive (+) and the other is negative (−).

Rule: A positive × a negative = negative

Additional information:

Like signs means: both integers are positive (+) or both are negative (−).

Last verified on 13-03-2026

Explanation

LCM of 12, 16, 24:

12 = 2² × 3

16 = 2⁴

24 = 2³ × 3

LCM = 2⁴ × 3 = 48

Last verified on 13-03-2026

Explanation

A number is divisible by 9 if sum of its digits is divisible by 9.

7893 → 7+8+9+3 = 27, which is divisible by 9.

Last verified on 13-03-2026

Explanation

The upper-class limit is the higher value of the class interval.

So, for (10-50), it's 50.

Last verified on 13-03-2026

Explanation

• Law of Inertia = Newton’s First Law of Motion.
• States: “An object at rest stays at rest, and an object in motion continues in the same direction and speed unless acted upon by an unbalanced force.”
• Explains why seat belts are important in cars.
• Applies to all objects on Earth and in space.

Last verified on 13-03-2026