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**Simplification Questions can be solved in just a few seconds if you work backwards and use the number at the units place.**

Simplification unlike its name was not taught to us in a simple way but in a complicated way because of which we take long to solve Simplification Questions even in SBI PO, IBPS and SSC Exams. But this smart method where you have to smartly use the digits in the units place will simplify this problem for you.

The 19

^{th}smart method in this series of blog posts will help you solve simplification questions in 5- 10 seconds that would otherwise take 30- 45 seconds.###
**Simplification**

Simplification is one of those easy topics from our school text book that has made its way to the syllabus of most competitive exams. PEDMAS is an acronym we all swore by in school- Parentheses, Exponents, Multiplication, Division, Addition, Subtraction and followed to the hilt while solving questions. However the only glitch that we often faced was that of big complicated calculations.

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**Example of Simplification Questions Asked in Competitive Exams**

(?)

^{2}+ (65)^{2}= (160)^{2}- (90)^{2}- 7191
1)75 2)77 3) 79 4) 81 5) None of these

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**Conventional Method to Solve Simplification Questions**

The Quintessential approach would involve following the acronym and solving the expression

**Step 1:**

65

^{2}= 4225, 160^{2}= 25600, 90^{2}= 8100
(?)

^{2 }+ 4225 = 25600 – 8100 – 7191

**Step 2:**

(?)

^{2 }= 25600 – 8100 – 7191 – 4225

**Step 3:**

(?)

^{2}= 6084

**Step 4:**

? = Square Root of 6084

**Step 5:**

? = 78

That’s a truck load of calculation to reach one answer and that too in almost 30 seconds!

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**Smart Method to Solve Simplification Questions**

Welcome to the smart way of doing things where we believe that no question should take more than 15 seconds.

*Have a look at the options and work backwards because in questions like these where just the digit at the units place is sufficient for you to choose the correct answer.*
(?)

^{2}+ (65)^{2}= (160)^{2}- (90)^{2}– 7191

**Step 1:**

Units place of 65

^{2}= 5, Units place of 160^{2}= 0, Units place of 90^{2}= 0
Considering only units place we get

**Step 2:**

(?)

^{2}+ _5 = _0 - _0 - _1

**Step 3:**

(?)

^{2}= _0 - _0 - _1 - _5

**Step 4:**

(?)

^{2 }= _4, this implies that it has to be a number that ends with 2 or 8, which in this case is neither of the options and answer is Option 5
Easy, Crisp and Time Saving!

Watch our expert faculty explain simplifications in the simplest way.

Solve the following Simplification Questions using the numbers at digits at place-

Question 1: ?

^{2}+ 79^{2}= 172^{2}– 88^{2}- 8203
1) 93 2) 89 3)83 4)81 5) None of these

Question 2: Square root of 3249 + 75

^{2}+ Square root of ? = 5745
1) 3721 2) 4096 3) 3481 4) 3969 5) 3364

Remember to leave answers to the above questions in the comments section and tell us how the number at units place helped you reach the correct answer in just a few seconds.

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