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प्रश्न
When Raju multiplies a certain number by 17 and adds 4 to the product, he gets 225. Find that number.
उत्तर
Let the required number be x.
When Raju multiplies it with 17, the number becomes 17x.
According to the question :
17x + 4 = 225
or, 17x + 4 − 4 = 225 − 4 [Subtracting 4 from both the sides]
or, 17x = 221
or, `(17x)/17=221/17` [Dividing both the sides by 17]
or, x = 13
Thus, the required number is 13.
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संबंधित प्रश्न
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How many segments are required to form 5, 10, 100 digits of the kind −
Observe the patterns of digits made from line segments of equal length. You will find such segmented digits on the display of electronic watches or calculators.
If the number of digits formed is taken to be n, the number of segments required to form n digits is given by the algebraic expression appearing on the right of each pattern.
How many segments are required to form 5, 10, 100 digits of the kind −
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The sum of two consecutive even numbers is 74. Find the numbers.
Mrs. Goel is 27 years older than her daughter Rekha. After 8 years she will be twice as old as Rekha. Find their present ages.
If x is a negative integer, – x is a positive integer.
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To find sum of three numbers 14, 27 and 13, we can have two ways:
- We may first add 14 and 27 to get 41 and then add 13 to it to get the total sum 54 or
- We may add 27 and 13 to get 40 and then add 14 to get the sum 54. Thus, (14 + 27) + 13 = 14 + (27 + 13)
This can be done for any three numbers. This property is known as the associativity of addition of numbers. Express this property which we have already studied in the chapter on whole numbers, in a general way, by using variables a, b and c.
