Explanation

• Mercury is the closest planet to the Sun, followed by Venus.
• Called an inner planet because it orbits inside Earth’s orbit.
• Number of moons: 0 (Mercury has no natural satellites).
• Size: Smallest planet in the solar system.
• Nickname: Swift Planet, due to its fast orbit around the Sun (≈88 days per orbit).

Last verified on 17-03-2026

Explanation

• Nitrogen (N2) makes up about 78% of the Earth's atmosphere.
• Making it the most abundant gas in the atmosphere.
• It is followed by oxygen (~21%), with other gases in much smaller amounts.

Last verified on 15-03-2026

Explanation

• Gene Definition: Basic physical and functional unit of heredity
• Location: Found on chromosomes within DNA
• Function: Codes for proteins or RNA molecules that determine traits
• Types: Structural genes (proteins), regulatory genes (control expression)
• Inheritance: Passed from parents to offspring during reproduction

Last verified on 05-02-2026

Explanation

There are 7 days in a week.

61 days ÷ 7 days/week = 8 weeks and 5 days.

If today is Monday, after 8 weeks it will still be Monday.

After 5 more days:

Monday, Tuesday, Wednesday, Thursday, Friday

So, after 61 days, it will be Saturday.

Last updated on 09-03-2026

Explanation

At 4:20, the hour hand is between 4 and 5.

Hour hand angle from 12:

4 × 30° = 120°

Additional angle for 20 minutes:

(20/60) × 30° = 10°

Total hour hand angle:

120° + 10° = 130°

Minute hand angle from 12:

20 × 6° = 120°

Angle between hour and minute hands:

130° - 120° = 10°

Last verified on 22-02-2026

Explanation

Step 1: Let's denote the two numbers as x and y.
We have two equations:

1. x + y = 28

2. x - y = 4

Step 2: Solve the system of equations.
Adding the two equations eliminates y:
(x + y) + (x - y) = 28 + 4
2x = 32
Step 3: Solve for x.
x = 32 / 2
x = 16
Step 4: Solve for y.
Substitute x into one of the original equations:
16 + y = 28
y = 28 - 16
y = 12
Step 5: Identify the correct pair of numbers.
The numbers are 16 and 12.

Explanation

The decimal system is base 10, using digits 0–9.

Base 8 → Octal number system (digits 0–7).

Base 16 → Hexadecimal number system (digits 0–9, A–F).

Base 4 → Quaternary number system (digits 0–3).

Explanation

Explanation

Following the Order of Operations (PEMDAS/BODMAS)

Expression: 2 + 2 ÷ 2 × 2 - 2

= 2 + 1 × 2 - 2

= 2 + 2 - 2

= 4 - 2

= 2

Explanation

cos 60° = adjacent side / hypotenuse

= 4.6 / length of ladder

1/2 = 4.6 / length

length = 4.6 × 2

= 9.2 m