*‘BODMAS’ Rule:*

This rule depicts the correct sequence in which the operations are to be executed, so as to find out the value of given expression.

Here B – Bracket,

O – of,

D – Division,

M – Multiplication,

A – Addition and

S – Subtraction

Thus, in simplifying an expression, first of all the brackets must be removed, strictly in the order (), {} and ||.

After removing the brackets, we must use the following operations strictly in the order:

(i) of (ii) Division (iii) Multiplication (iv) Addition (v) Subtraction.

*2.Virnaculum (or Bar):*

When an expression contains Virnaculum, before applying the ‘BODMAS’ rule, we simplify the expression under the Virnaculum.

3.Modulus of a Real Number:

Modulus of a real number a is defined as

|a| = a, if a > 0

-a, if a < 0

Thus, |5| = 5 and |-5| = -(-5) = 5

Download here : **30 Simplification Questions PDF **

**What will come at place of ?: (3/8 of 168)*15 ÷ 5 + ? = 549 ÷ 9 + 235**

- 189
- 107
- 174
- 296
- None of these

**Solution:** Using the BODMAS rule

(3*168÷8)*15 ÷ 5 + ? = 549 ÷ 9 + 235

(504÷8)*3 + ? = 61 + 235

63*3 + ? = 296

189 + ? = 296

? = 107 (Option 2)