If ‘A’ stands for ‘÷’ , ‘B’ stands for ‘×’, ‘C’ stands for ‘+’ and ‘D’ stands for ‘-‘ , what will come in place of question mark ‘?’ in the following equation? 14 B 2 D 10 A 5 C 12 = ?
38
Replace each letter by its operation: A → ÷, B → ×, C → +, D → –.
14 B 2 D 10 A 5 C 12 becomes 14 × 2 – 10 ÷ 5 + 12.
Apply BODMAS: 14 × 2 = 28 and 10 ÷ 5 = 2, so the expression is 28 – 2 + 12.
Then 28 – 2 = 26 and 26 + 12 = 38.
Check: adding the positive parts 28 + 12 = 40 and subtracting the negative part 2 gives 40 – 2 = 38, the same value.
Hence, 38.
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Important Questions from Mathematical Operations
Select the set, from the given options, in which the numbers are related in the same way as are the numbers of the following sets.
(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)
(6, 13, 78)
(5, 22, 110)
If + means -, - means ×, × means ÷, ÷ means +, then what will come in place of the question mark (?) in the following equation?
28 - 6 ÷ 4 + 14 × 14 = ?
In the following number-pairs, the second number is obtained by applying certain mathematical operations to the first number. Which numbers should replace X and Y so that the pattern followed by the two numbers on the left side of :: is the same as that on the right side of :: ?
(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 Operations on 13 such as adding/subtracting /multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)
X : 649 :: 956 : Y
Which two numbers should be interchanged to make the given equation correct?
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(Note: Interchange should be done of the entire number and not individual digits of a given number.)
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