Explanation

Let y be the number. Then we have: 20% of y + 120 = y Simplifying, we get: 0.2y + 120 = y Subtracting 0.2y from both sides, we get: 120 = 0.8y Dividing both sides by 0.8, we get: y = 150 So the number is **150**.

You can check the answer by plugging it back into the original equation: 20% of 150 + 120 = 150 30 + 120 = 150 150 = 150 

Explanation

HCM of 120 is not 74.

There, B is the correct option

HCF: Highest Common factor

Explanation

The calculation is as follows:

5/2 - 4/2 = 1/2

Explanation

When you add 0.5 and 0.5, the result is 1 (0.5 + 0.5 = 1).

Explanation

45% of 600 students is calculated as follows:

0.45×600=270

Explanation

Explanation

we can simply multiply the two numbers together.

5.9 x 40 = 236.

Explanation

(25 x 10)/(5(6-4)2) =?

First we solve brackets:

⇒ 250/10(2)

⇒ 25/2

Explanation

This solution deals with linear equations 

12/8 +2.5 = ?

1.5 + 2.5 = ?

1.5  + 2.5 = 4

Explanation

Solution:

Every year population increase = 700

after five year population increase = 5 x 700= 3500

So intial population = 25000-3500=21500