What will come in the place of ‘?’ in the following equation, if ‘+’ and ‘-‘ are interchanged and ‘x’ and ‘÷’ are interchanged? 105 – 90 × 6 ÷ 3 + 110 = ?
40
Interchange ‘+’ with ‘−’ and ‘×’ with ‘÷’ in 105 – 90 × 6 ÷ 3 + 110:
105 + 90 ÷ 6 × 3 − 110
Division first: 90 ÷ 6 = 15; then multiplication: 15 × 3 = 45.
105 + 45 − 110 = 150 − 110 = 40
Hence, the answer is 40.
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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.
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(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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