Study Materials for IBPS, Bank Exams : Mental Ability/Reasoning : Arithmetical Reasoning
Study Materials for IBPS, Bank Exams : Mental Ability/Reasoning : Arithmetical Reasoning
First we should know some mathematical operations. They are add (+), subtraction (–), multiply (×) and division (÷), greater than (>), less than (<). This test is set up to test candidates skill in mathematical operations. The questions involving these operations are set using artificial symbols. You are required to substitute the real signs and solve the questions accordingly, to get the answer.
Different Type of Questions
There are three types of questions based on mathematical operations which are asked in various competitive examinations. They are,
Problem-Solving by Substitution
In such type of questions you have some substitutes for various mathematical symbols or numerals followed by a question involving calculation of an expression or choosing the correct/incorrect equation.
Rule BODMAS
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Brackets
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Of
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Division
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Multiplication
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Addition
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Subtraction
While solving a mathematical operations proceed according to the BODMAS’ formula.
Example 1: If ‘+’ means ‘minus’ ‘×’ means ‘divided by’ ‘÷’ means ‘plus’ and ‘–’means ‘multiplied by’ then which of the following will be the value of expression 7 × 3.5 ÷ 2 – 4 + 5 ?
(1) 4
(2) 5
(3) 11
(4) 13
(5) None of these
Solution. (2) Using the proper notations in the given expression, we have
= 7 × 3.5 ÷ 2 – 4 + 5 = 7 ÷ 3.5 + 2 × 4 – 5
= 2 + 2 × 4 – 5 = 2 + 8 – 5 = 10 – 5 = 5
