Explanation

1. Current Ages:

   • Let Zoya’s current age be $x$
   • Then, Zaid’s current age is $6x$ (since he is six times as old as Zoya).

2. The sum of Ages in 7 Years:

   • In 7 years, Zoya's age will be $x + 7$ and Zaid's age will be $6x + 7$.
   • The sum of their ages in 7 years will be $(x+7)+(6x+7)=49$.

Step 1: Formulate the Equation

x+7+6x+7=49
$$7x+14=49$$

Step 2: Solve for $x$

Subtract 14 from both sides:

$$7x=35$$

Now divide by 7:

$$x=5$$

So, Zoya’s current age is $5$ years and Zaid’s current age is:

$$6x=6\times 5=30$$

Step 3: Determine Zaid’s Age When Zoya Was Born

When Zoya was born, Zaid would have been:

$$30-5=25$$

Explanation

First discount = 20%, so 80% of price remains.

Second discount = 20% on 80%, which is 16%.

Total discount = 20% + 16% = 36%

Explanation

10% of 38 = (10 ÷ 100) × 38 = 3.8

Explanation

Percentage = (210 ÷ 420) × 100 = 50%

Explanation

To find the percentage, divide 210 by 480 and multiply by 100:

(210 ÷ 480) × 100 = 43.75%

Explanation

To calculate (5)^4:

(5)^4 = 5 × 5 × 5 × 5

= 625

Explanation

148 divided by 37 equals 4, with no remainder.

Explanation

79 + 69 = 148

148 + 59 = 207

207 + 89 = 296

296 + 99 = 395

Explanation

Multiplying 3.29 by 1000 gives:

3.29 × 1000 = 3290

Explanation

Given:

- 4 weavers weave 4 mats in 4 days  

- So, each weaver weaves 1 mat in 4 days

Now, you have 8 weavers working at the same rate.

If 1 weaver weaves 1 mat in 4 days, then:

- 8 weavers will weave 8 mats in 4 days