Explanation

NOTE:

• If the question only says “all four sides are equal,” then the correct answer is a rhombus.
• If the question says “all four sides are equal, and all four angles are right angles (90°),” then the correct answer is Square.
• Example:
• Diamond shape ◇ = Rhombus
• Box shape □ = Square

Last updated by NA on 27 April 2026

Explanation

Dear Money is expensive to borrow because the rate of interest is high.

This is because people prefer to save when interest rates are high and spend or borrow when rates are low.

Put differently, the cost of money becomes more expensive.

Explanation

To find the percentage of 0.001, follow these steps:

1. Multiply the number by 100 to convert it into a percentage:

   $$0.001\times 100=0.1$$

2. So, 0.001 as a percentage is 0.1%.

Explanation

You (the husband)

Your wife

Two sons

Each son has one sister, which means there is one daughter (not two, as both sons share the same sister)

So, the family consists of:

2 parents (you and your wife)

2 sons

1 daughter

Adding them up:2+2+1=5

Explanation

n(A) = 75% of 600 = 450

n(B) = 45% of 600 = 270 and n(A ∪ B) = 600

∵ n(A∩B) = n (A) + n(B) - n(A∪B) = (450 + 270 - 600) = 120

Explanation

The mean proportional between two numbers a and b is a number x such that: a : x :: x : b

In this case, we want to find the mean proportional between 64 and 81.

Let's set up the proportion: 64 : x :: x : 81

We can rewrite this as: 64/x = x/81

Cross-multiplying, we get: 64 × 81 = x^2

Simplifying, we get: 5184 = x^2

Taking the square root of both sides, we get:

x = √5184

x = 72

So, the mean proportional between 64 and 81 is 72.

Explanation

The ratio of copper to silver is 3:7.

To find the percentage of silver in the alloy, we can use the following formula:

Percentage of silver = (Amount of silver / Total amount) × 100

First, let's find the total amount:

Total amount = Copper + Silver

= 3 + 7

= 10

Now, we can plug in the values:

Percentage of silver = (7 / 10) × 100 = 70%

So, the percentage quantity of silver in the alloy is 70%.

The correct answer is: 70%

Explanation

A polygon having 8 sides is called octagon.

A polygon having 10 sides is called decagon.

A polygon having 4 sides is called quadrilateral.

Explanation

The mean of 5 observations is 10.

This means the sum of the 5 observations is:

$$\text{Sum of 5 observations}=\text{Mean}\times \text{Number of observations}=10\times 5=50$$

Now, a new observation (10) is added. The new sum becomes:

$$\text{New sum}=50+10=60$$

The new mean of the 6 observations is:

New mean=New sum/Number of observations

​=660​

=10

Explanation

The range of probability for each event lies between 0 and 1.

This means that the probability of any event can be a value from 0 (impossible event) to 1 (certain event).